diff --git a/Makefile b/Makefile
index 90553f2..4570055 100644
--- a/Makefile
+++ b/Makefile
@@ -31,4 +31,9 @@ publish:
 	pip install 'twine>=1.5.0'
 	python setup.py sdist bdist_wheel
 	twine upload dist/*
-	rm -fr build dist .egg requests.egg-info
\ No newline at end of file
+	rm -fr build dist .egg requests.egg-info
+
+update-reqs-files:
+	pipenv lock
+	pipenv requirements > requirements.txt
+	pipenv requirements --dev-only > dev-requirements.txt
diff --git a/Pipfile b/Pipfile
index 9d8042f..e3e78c6 100644
--- a/Pipfile
+++ b/Pipfile
@@ -4,37 +4,13 @@ url = "https://pypi.org/simple"
 verify_ssl = true
 
 [dev-packages]
-flake8 = "*"
+flake8 = "==3.9.2"
 coverage = "*"
 pytest = "*"
 tox = "*"
 
 [packages]
 click = "*"
-appdirs = "==1.4.3"
-atomicwrites = "==1.3.0"
-attrs = "==19.3.0"
-colorama = "==0.4.3"
-coverage = "==5.1"
-distlib = "==0.3.0"
-entrypoints = "==0.3"
-filelock = "==3.0.12"
-flake8 = "==3.7.9"
-importlib-metadata = "==1.6.0"
-mccabe = "==0.6.1"
-more-itertools = "==8.2.0"
-pluggy = "==0.13.1"
-py = "==1.8.1"
-pycodestyle = "==2.5.0"
-pyflakes = "==2.1.1"
-pyparsing = "==2.4.7"
-pytest = "==5.4.1"
-six = "==1.14.0"
-toml = "==0.10.0"
-tox = "==3.14.6"
-virtualenv = "==20.0.18"
-wcwidth = "==0.1.9"
-zipp = "==3.1.0"
 
 [requires]
 python_version = "3.7"
diff --git a/Pipfile.lock b/Pipfile.lock
index 5339128..d34fc64 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "a818531456c3596d585d71c33c2b6cc7f855976e357a8d9c1d9dd389d4ca0d1a"
+            "sha256": "4e79dadf0c4fb445dda5b6b77378ec7048b4b12832f4fb34d83e51a5ae463cb3"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -16,344 +16,125 @@
         ]
     },
     "default": {
-        "appdirs": {
-            "hashes": [
-                "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92",
-                "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
-            ],
-            "index": "pypi",
-            "version": "==1.4.3"
-        },
-        "atomicwrites": {
-            "hashes": [
-                "sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4",
-                "sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6"
-            ],
-            "index": "pypi",
-            "version": "==1.3.0"
-        },
-        "attrs": {
-            "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
-            ],
-            "index": "pypi",
-            "version": "==19.3.0"
-        },
         "click": {
             "hashes": [
-                "sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a",
-                "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"
-            ],
-            "index": "pypi",
-            "version": "==7.1.2"
-        },
-        "colorama": {
-            "hashes": [
-                "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff",
-                "sha256:e96da0d330793e2cb9485e9ddfd918d456036c7149416295932478192f4436a1"
+                "sha256:7682dc8afb30297001674575ea00d1814d808d6a36af415a82bd481d37ba7b8e",
+                "sha256:bb4d8133cb15a609f44e8213d9b391b0809795062913b383c62be0ee95b1db48"
             ],
             "index": "pypi",
-            "version": "==0.4.3"
-        },
-        "coverage": {
-            "hashes": [
-                "sha256:00f1d23f4336efc3b311ed0d807feb45098fc86dee1ca13b3d6768cdab187c8a",
-                "sha256:01333e1bd22c59713ba8a79f088b3955946e293114479bbfc2e37d522be03355",
-                "sha256:0cb4be7e784dcdc050fc58ef05b71aa8e89b7e6636b99967fadbdba694cf2b65",
-                "sha256:0e61d9803d5851849c24f78227939c701ced6704f337cad0a91e0972c51c1ee7",
-                "sha256:1601e480b9b99697a570cea7ef749e88123c04b92d84cedaa01e117436b4a0a9",
-                "sha256:2742c7515b9eb368718cd091bad1a1b44135cc72468c731302b3d641895b83d1",
-                "sha256:2d27a3f742c98e5c6b461ee6ef7287400a1956c11421eb574d843d9ec1f772f0",
-                "sha256:402e1744733df483b93abbf209283898e9f0d67470707e3c7516d84f48524f55",
-                "sha256:5c542d1e62eece33c306d66fe0a5c4f7f7b3c08fecc46ead86d7916684b36d6c",
-                "sha256:5f2294dbf7875b991c381e3d5af2bcc3494d836affa52b809c91697449d0eda6",
-                "sha256:6402bd2fdedabbdb63a316308142597534ea8e1895f4e7d8bf7476c5e8751fef",
-                "sha256:66460ab1599d3cf894bb6baee8c684788819b71a5dc1e8fa2ecc152e5d752019",
-                "sha256:782caea581a6e9ff75eccda79287daefd1d2631cc09d642b6ee2d6da21fc0a4e",
-                "sha256:79a3cfd6346ce6c13145731d39db47b7a7b859c0272f02cdb89a3bdcbae233a0",
-                "sha256:7a5bdad4edec57b5fb8dae7d3ee58622d626fd3a0be0dfceda162a7035885ecf",
-                "sha256:8fa0cbc7ecad630e5b0f4f35b0f6ad419246b02bc750de7ac66db92667996d24",
-                "sha256:a027ef0492ede1e03a8054e3c37b8def89a1e3c471482e9f046906ba4f2aafd2",
-                "sha256:a3f3654d5734a3ece152636aad89f58afc9213c6520062db3978239db122f03c",
-                "sha256:a82b92b04a23d3c8a581fc049228bafde988abacba397d57ce95fe95e0338ab4",
-                "sha256:acf3763ed01af8410fc36afea23707d4ea58ba7e86a8ee915dfb9ceff9ef69d0",
-                "sha256:adeb4c5b608574a3d647011af36f7586811a2c1197c861aedb548dd2453b41cd",
-                "sha256:b83835506dfc185a319031cf853fa4bb1b3974b1f913f5bb1a0f3d98bdcded04",
-                "sha256:bb28a7245de68bf29f6fb199545d072d1036a1917dca17a1e75bbb919e14ee8e",
-                "sha256:bf9cb9a9fd8891e7efd2d44deb24b86d647394b9705b744ff6f8261e6f29a730",
-                "sha256:c317eaf5ff46a34305b202e73404f55f7389ef834b8dbf4da09b9b9b37f76dd2",
-                "sha256:dbe8c6ae7534b5b024296464f387d57c13caa942f6d8e6e0346f27e509f0f768",
-                "sha256:de807ae933cfb7f0c7d9d981a053772452217df2bf38e7e6267c9cbf9545a796",
-                "sha256:dead2ddede4c7ba6cb3a721870f5141c97dc7d85a079edb4bd8d88c3ad5b20c7",
-                "sha256:dec5202bfe6f672d4511086e125db035a52b00f1648d6407cc8e526912c0353a",
-                "sha256:e1ea316102ea1e1770724db01998d1603ed921c54a86a2efcb03428d5417e489",
-                "sha256:f90bfc4ad18450c80b024036eaf91e4a246ae287701aaa88eaebebf150868052"
-            ],
-            "index": "pypi",
-            "version": "==5.1"
-        },
-        "distlib": {
-            "hashes": [
-                "sha256:2e166e231a26b36d6dfe35a48c4464346620f8645ed0ace01ee31822b288de21"
-            ],
-            "index": "pypi",
-            "version": "==0.3.0"
-        },
-        "entrypoints": {
-            "hashes": [
-                "sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19",
-                "sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451"
-            ],
-            "index": "pypi",
-            "version": "==0.3"
-        },
-        "filelock": {
-            "hashes": [
-                "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59",
-                "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"
-            ],
-            "index": "pypi",
-            "version": "==3.0.12"
-        },
-        "flake8": {
-            "hashes": [
-                "sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb",
-                "sha256:49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca"
-            ],
-            "index": "pypi",
-            "version": "==3.7.9"
+            "version": "==8.1.3"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:2a688cbaa90e0cc587f1df48bdc97a6eadccdcd9c35fb3f976a09e3b5016d90f",
-                "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"
-            ],
-            "index": "pypi",
-            "version": "==1.6.0"
-        },
-        "mccabe": {
-            "hashes": [
-                "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
-                "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
-            ],
-            "index": "pypi",
-            "version": "==0.6.1"
-        },
-        "more-itertools": {
-            "hashes": [
-                "sha256:5dd8bcf33e5f9513ffa06d5ad33d78f31e1931ac9a18f33d37e77a180d393a7c",
-                "sha256:b1ddb932186d8a6ac451e1d95844b382f55e12686d51ca0c68b6f61f2ab7a507"
-            ],
-            "index": "pypi",
-            "version": "==8.2.0"
-        },
-        "packaging": {
-            "hashes": [
-                "sha256:24e0da08660a87484d1602c30bb4902d74816b6985b93de36926f5bc95741858",
-                "sha256:78598185a7008a470d64526a8059de9aaa449238f280fc9eb6b13ba6c4109093"
-            ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.8"
-        },
-        "pluggy": {
-            "hashes": [
-                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
-                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
-            ],
-            "index": "pypi",
-            "version": "==0.13.1"
-        },
-        "py": {
-            "hashes": [
-                "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa",
-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
-            ],
-            "index": "pypi",
-            "version": "==1.8.1"
-        },
-        "pycodestyle": {
-            "hashes": [
-                "sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56",
-                "sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c"
-            ],
-            "index": "pypi",
-            "version": "==2.5.0"
-        },
-        "pyflakes": {
-            "hashes": [
-                "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0",
-                "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"
-            ],
-            "index": "pypi",
-            "version": "==2.1.1"
-        },
-        "pyparsing": {
-            "hashes": [
-                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
-                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
-            ],
-            "index": "pypi",
-            "version": "==2.4.7"
-        },
-        "pytest": {
-            "hashes": [
-                "sha256:0e5b30f5cb04e887b91b1ee519fa3d89049595f428c1db76e73bd7f17b09b172",
-                "sha256:84dde37075b8805f3d1f392cc47e38a0e59518fb46a431cfdaf7cf1ce805f970"
-            ],
-            "index": "pypi",
-            "version": "==5.4.1"
-        },
-        "six": {
-            "hashes": [
-                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
-                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
+                "sha256:637245b8bab2b6502fcbc752cc4b7a6f6243bb02b31c5c26156ad103d3d45670",
+                "sha256:7401a975809ea1fdc658c3aa4f78cc2195a0e019c5cbc4c06122884e9ae80c23"
             ],
-            "index": "pypi",
-            "version": "==1.14.0"
+            "markers": "python_version < '3.8'",
+            "version": "==4.12.0"
         },
-        "toml": {
+        "typing-extensions": {
             "hashes": [
-                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
-                "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e",
-                "sha256:f1db651f9657708513243e61e6cc67d101a39bad662eaa9b5546f789338e07a3"
+                "sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02",
+                "sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6"
             ],
-            "index": "pypi",
-            "version": "==0.10.0"
-        },
-        "tox": {
-            "hashes": [
-                "sha256:a4a6689045d93c208d77230853b28058b7513f5123647b67bf012f82fa168303",
-                "sha256:b2c4b91c975ea5c11463d9ca00bebf82654439c5df0f614807b9bdec62cc9471"
-            ],
-            "index": "pypi",
-            "version": "==3.14.6"
-        },
-        "virtualenv": {
-            "hashes": [
-                "sha256:5021396e8f03d0d002a770da90e31e61159684db2859d0ba4850fbea752aa675",
-                "sha256:ac53ade75ca189bc97b6c1d9ec0f1a50efe33cbf178ae09452dcd9fd309013c1"
-            ],
-            "index": "pypi",
-            "version": "==20.0.18"
-        },
-        "wcwidth": {
-            "hashes": [
-                "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1",
-                "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"
-            ],
-            "index": "pypi",
-            "version": "==0.1.9"
+            "markers": "python_version < '3.8'",
+            "version": "==4.3.0"
         },
         "zipp": {
             "hashes": [
-                "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b",
-                "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"
+                "sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2",
+                "sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009"
             ],
-            "index": "pypi",
-            "version": "==3.1.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.8.1"
         }
     },
     "develop": {
-        "appdirs": {
-            "hashes": [
-                "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92",
-                "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
-            ],
-            "index": "pypi",
-            "version": "==1.4.3"
-        },
-        "atomicwrites": {
-            "hashes": [
-                "sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4",
-                "sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6"
-            ],
-            "index": "pypi",
-            "version": "==1.3.0"
-        },
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
-            ],
-            "index": "pypi",
-            "version": "==19.3.0"
-        },
-        "colorama": {
-            "hashes": [
-                "sha256:7d73d2a99753107a36ac6b455ee49046802e59d9d076ef8e47b61499fa29afff",
-                "sha256:e96da0d330793e2cb9485e9ddfd918d456036c7149416295932478192f4436a1"
+                "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4",
+                "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"
             ],
-            "index": "pypi",
-            "version": "==0.4.3"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==21.4.0"
         },
         "coverage": {
             "hashes": [
-                "sha256:00f1d23f4336efc3b311ed0d807feb45098fc86dee1ca13b3d6768cdab187c8a",
-                "sha256:01333e1bd22c59713ba8a79f088b3955946e293114479bbfc2e37d522be03355",
-                "sha256:0cb4be7e784dcdc050fc58ef05b71aa8e89b7e6636b99967fadbdba694cf2b65",
-                "sha256:0e61d9803d5851849c24f78227939c701ced6704f337cad0a91e0972c51c1ee7",
-                "sha256:1601e480b9b99697a570cea7ef749e88123c04b92d84cedaa01e117436b4a0a9",
-                "sha256:2742c7515b9eb368718cd091bad1a1b44135cc72468c731302b3d641895b83d1",
-                "sha256:2d27a3f742c98e5c6b461ee6ef7287400a1956c11421eb574d843d9ec1f772f0",
-                "sha256:402e1744733df483b93abbf209283898e9f0d67470707e3c7516d84f48524f55",
-                "sha256:5c542d1e62eece33c306d66fe0a5c4f7f7b3c08fecc46ead86d7916684b36d6c",
-                "sha256:5f2294dbf7875b991c381e3d5af2bcc3494d836affa52b809c91697449d0eda6",
-                "sha256:6402bd2fdedabbdb63a316308142597534ea8e1895f4e7d8bf7476c5e8751fef",
-                "sha256:66460ab1599d3cf894bb6baee8c684788819b71a5dc1e8fa2ecc152e5d752019",
-                "sha256:782caea581a6e9ff75eccda79287daefd1d2631cc09d642b6ee2d6da21fc0a4e",
-                "sha256:79a3cfd6346ce6c13145731d39db47b7a7b859c0272f02cdb89a3bdcbae233a0",
-                "sha256:7a5bdad4edec57b5fb8dae7d3ee58622d626fd3a0be0dfceda162a7035885ecf",
-                "sha256:8fa0cbc7ecad630e5b0f4f35b0f6ad419246b02bc750de7ac66db92667996d24",
-                "sha256:a027ef0492ede1e03a8054e3c37b8def89a1e3c471482e9f046906ba4f2aafd2",
-                "sha256:a3f3654d5734a3ece152636aad89f58afc9213c6520062db3978239db122f03c",
-                "sha256:a82b92b04a23d3c8a581fc049228bafde988abacba397d57ce95fe95e0338ab4",
-                "sha256:acf3763ed01af8410fc36afea23707d4ea58ba7e86a8ee915dfb9ceff9ef69d0",
-                "sha256:adeb4c5b608574a3d647011af36f7586811a2c1197c861aedb548dd2453b41cd",
-                "sha256:b83835506dfc185a319031cf853fa4bb1b3974b1f913f5bb1a0f3d98bdcded04",
-                "sha256:bb28a7245de68bf29f6fb199545d072d1036a1917dca17a1e75bbb919e14ee8e",
-                "sha256:bf9cb9a9fd8891e7efd2d44deb24b86d647394b9705b744ff6f8261e6f29a730",
-                "sha256:c317eaf5ff46a34305b202e73404f55f7389ef834b8dbf4da09b9b9b37f76dd2",
-                "sha256:dbe8c6ae7534b5b024296464f387d57c13caa942f6d8e6e0346f27e509f0f768",
-                "sha256:de807ae933cfb7f0c7d9d981a053772452217df2bf38e7e6267c9cbf9545a796",
-                "sha256:dead2ddede4c7ba6cb3a721870f5141c97dc7d85a079edb4bd8d88c3ad5b20c7",
-                "sha256:dec5202bfe6f672d4511086e125db035a52b00f1648d6407cc8e526912c0353a",
-                "sha256:e1ea316102ea1e1770724db01998d1603ed921c54a86a2efcb03428d5417e489",
-                "sha256:f90bfc4ad18450c80b024036eaf91e4a246ae287701aaa88eaebebf150868052"
-            ],
-            "index": "pypi",
-            "version": "==5.1"
+                "sha256:0895ea6e6f7f9939166cc835df8fa4599e2d9b759b02d1521b574e13b859ac32",
+                "sha256:0f211df2cba951ffcae210ee00e54921ab42e2b64e0bf2c0befc977377fb09b7",
+                "sha256:147605e1702d996279bb3cc3b164f408698850011210d133a2cb96a73a2f7996",
+                "sha256:24b04d305ea172ccb21bee5bacd559383cba2c6fcdef85b7701cf2de4188aa55",
+                "sha256:25b7ec944f114f70803d6529394b64f8749e93cbfac0fe6c5ea1b7e6c14e8a46",
+                "sha256:2b20286c2b726f94e766e86a3fddb7b7e37af5d0c635bdfa7e4399bc523563de",
+                "sha256:2dff52b3e7f76ada36f82124703f4953186d9029d00d6287f17c68a75e2e6039",
+                "sha256:2f8553878a24b00d5ab04b7a92a2af50409247ca5c4b7a2bf4eabe94ed20d3ee",
+                "sha256:3def6791adf580d66f025223078dc84c64696a26f174131059ce8e91452584e1",
+                "sha256:422fa44070b42fef9fb8dabd5af03861708cdd6deb69463adc2130b7bf81332f",
+                "sha256:4f89d8e03c8a3757aae65570d14033e8edf192ee9298303db15955cadcff0c63",
+                "sha256:5336e0352c0b12c7e72727d50ff02557005f79a0b8dcad9219c7c4940a930083",
+                "sha256:54d8d0e073a7f238f0666d3c7c0d37469b2aa43311e4024c925ee14f5d5a1cbe",
+                "sha256:5ef42e1db047ca42827a85e34abe973971c635f83aed49611b7f3ab49d0130f0",
+                "sha256:5f65e5d3ff2d895dab76b1faca4586b970a99b5d4b24e9aafffc0ce94a6022d6",
+                "sha256:6c3ccfe89c36f3e5b9837b9ee507472310164f352c9fe332120b764c9d60adbe",
+                "sha256:6d0b48aff8e9720bdec315d67723f0babd936a7211dc5df453ddf76f89c59933",
+                "sha256:6fe75dcfcb889b6800f072f2af5a331342d63d0c1b3d2bf0f7b4f6c353e8c9c0",
+                "sha256:79419370d6a637cb18553ecb25228893966bd7935a9120fa454e7076f13b627c",
+                "sha256:7bb00521ab4f99fdce2d5c05a91bddc0280f0afaee0e0a00425e28e209d4af07",
+                "sha256:80db4a47a199c4563d4a25919ff29c97c87569130375beca3483b41ad5f698e8",
+                "sha256:866ebf42b4c5dbafd64455b0a1cd5aa7b4837a894809413b930026c91e18090b",
+                "sha256:8af6c26ba8df6338e57bedbf916d76bdae6308e57fc8f14397f03b5da8622b4e",
+                "sha256:a13772c19619118903d65a91f1d5fea84be494d12fd406d06c849b00d31bf120",
+                "sha256:a697977157adc052284a7160569b36a8bbec09db3c3220642e6323b47cec090f",
+                "sha256:a9032f9b7d38bdf882ac9f66ebde3afb8145f0d4c24b2e600bc4c6304aafb87e",
+                "sha256:b5e28db9199dd3833cc8a07fa6cf429a01227b5d429facb56eccd765050c26cd",
+                "sha256:c77943ef768276b61c96a3eb854eba55633c7a3fddf0a79f82805f232326d33f",
+                "sha256:d230d333b0be8042ac34808ad722eabba30036232e7a6fb3e317c49f61c93386",
+                "sha256:d4548be38a1c810d79e097a38107b6bf2ff42151900e47d49635be69943763d8",
+                "sha256:d4e7ced84a11c10160c0697a6cc0b214a5d7ab21dfec1cd46e89fbf77cc66fae",
+                "sha256:d56f105592188ce7a797b2bd94b4a8cb2e36d5d9b0d8a1d2060ff2a71e6b9bbc",
+                "sha256:d714af0bdba67739598849c9f18efdcc5a0412f4993914a0ec5ce0f1e864d783",
+                "sha256:d774d9e97007b018a651eadc1b3970ed20237395527e22cbeb743d8e73e0563d",
+                "sha256:e0524adb49c716ca763dbc1d27bedce36b14f33e6b8af6dba56886476b42957c",
+                "sha256:e2618cb2cf5a7cc8d698306e42ebcacd02fb7ef8cfc18485c59394152c70be97",
+                "sha256:e36750fbbc422c1c46c9d13b937ab437138b998fe74a635ec88989afb57a3978",
+                "sha256:edfdabe7aa4f97ed2b9dd5dde52d2bb29cb466993bb9d612ddd10d0085a683cf",
+                "sha256:f22325010d8824594820d6ce84fa830838f581a7fd86a9235f0d2ed6deb61e29",
+                "sha256:f23876b018dfa5d3e98e96f5644b109090f16a4acb22064e0f06933663005d39",
+                "sha256:f7bd0ffbcd03dc39490a1f40b2669cc414fae0c4e16b77bb26806a4d0b7d1452"
+            ],
+            "index": "pypi",
+            "version": "==6.4.2"
         },
         "distlib": {
             "hashes": [
-                "sha256:2e166e231a26b36d6dfe35a48c4464346620f8645ed0ace01ee31822b288de21"
+                "sha256:a7f75737c70be3b25e2bee06288cec4e4c221de18455b2dd037fe2a795cab2fe",
+                "sha256:b710088c59f06338ca514800ad795a132da19fda270e3ce4affc74abf955a26c"
             ],
-            "index": "pypi",
-            "version": "==0.3.0"
+            "version": "==0.3.5"
         },
         "filelock": {
             "hashes": [
-                "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59",
-                "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"
+                "sha256:37def7b658813cda163b56fc564cdc75e86d338246458c4c28ae84cabefa2404",
+                "sha256:3a0fd85166ad9dbab54c9aec96737b744106dc5f15c0b09a6744a445299fcf04"
             ],
-            "index": "pypi",
-            "version": "==3.0.12"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.7.1"
         },
         "flake8": {
             "hashes": [
-                "sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb",
-                "sha256:49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca"
+                "sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b",
+                "sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907"
             ],
             "index": "pypi",
-            "version": "==3.7.9"
+            "version": "==3.9.2"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:2a688cbaa90e0cc587f1df48bdc97a6eadccdcd9c35fb3f976a09e3b5016d90f",
-                "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"
+                "sha256:637245b8bab2b6502fcbc752cc4b7a6f6243bb02b31c5c26156ad103d3d45670",
+                "sha256:7401a975809ea1fdc658c3aa4f78cc2195a0e019c5cbc4c06122884e9ae80c23"
             ],
-            "index": "pypi",
-            "version": "==1.6.0"
+            "markers": "python_version < '3.8'",
+            "version": "==4.12.0"
         },
         "iniconfig": {
             "hashes": [
@@ -367,105 +148,127 @@
                 "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
                 "sha256:dd8d182285a0fe56bace7f45b5e7d1a6ebcbf524e8f3bd87eb0f125271b8831f"
             ],
-            "index": "pypi",
             "version": "==0.6.1"
         },
         "packaging": {
             "hashes": [
-                "sha256:24e0da08660a87484d1602c30bb4902d74816b6985b93de36926f5bc95741858",
-                "sha256:78598185a7008a470d64526a8059de9aaa449238f280fc9eb6b13ba6c4109093"
+                "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb",
+                "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.8"
+            "markers": "python_version >= '3.6'",
+            "version": "==21.3"
+        },
+        "platformdirs": {
+            "hashes": [
+                "sha256:027d8e83a2d7de06bbac4e5ef7e023c02b863d7ea5d079477e722bb41ab25788",
+                "sha256:58c8abb07dcb441e6ee4b11d8df0ac856038f944ab98b7be6b27b2a3c7feef19"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.5.2"
         },
         "pluggy": {
             "hashes": [
-                "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
-                "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
+                "sha256:4224373bacce55f955a878bf9cfa763c1e360858e330072059e10bad68531159",
+                "sha256:74134bbf457f031a36d68416e1509f34bd5ccc019f0bcc952c7b909d06b37bd3"
             ],
-            "index": "pypi",
-            "version": "==0.13.1"
+            "markers": "python_version >= '3.6'",
+            "version": "==1.0.0"
         },
         "py": {
             "hashes": [
-                "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa",
-                "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"
+                "sha256:51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719",
+                "sha256:607c53218732647dff4acdfcd50cb62615cedf612e72d1724fb1a0cc6405b378"
             ],
-            "index": "pypi",
-            "version": "==1.8.1"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==1.11.0"
         },
         "pycodestyle": {
             "hashes": [
-                "sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56",
-                "sha256:e40a936c9a450ad81df37f549d676d127b1b66000a6c500caa2b085bc0ca976c"
+                "sha256:514f76d918fcc0b55c6680472f0a37970994e07bbb80725808c17089be302068",
+                "sha256:c389c1d06bf7904078ca03399a4816f974a1d590090fecea0c63ec26ebaf1cef"
             ],
-            "index": "pypi",
-            "version": "==2.5.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.7.0"
         },
         "pyflakes": {
             "hashes": [
-                "sha256:17dbeb2e3f4d772725c777fabc446d5634d1038f234e77343108ce445ea69ce0",
-                "sha256:d976835886f8c5b31d47970ed689944a0262b5f3afa00a5a7b4dc81e5449f8a2"
+                "sha256:7893783d01b8a89811dd72d7dfd4d84ff098e5eed95cfa8905b22bbffe52efc3",
+                "sha256:f5bc8ecabc05bb9d291eb5203d6810b49040f6ff446a756326104746cc00c1db"
             ],
-            "index": "pypi",
-            "version": "==2.1.1"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==2.3.1"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
-                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
+                "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb",
+                "sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"
             ],
-            "index": "pypi",
-            "version": "==2.4.7"
+            "markers": "python_full_version >= '3.6.8'",
+            "version": "==3.0.9"
         },
         "pytest": {
             "hashes": [
-                "sha256:0e5b30f5cb04e887b91b1ee519fa3d89049595f428c1db76e73bd7f17b09b172",
-                "sha256:84dde37075b8805f3d1f392cc47e38a0e59518fb46a431cfdaf7cf1ce805f970"
+                "sha256:13d0e3ccfc2b6e26be000cb6568c832ba67ba32e719443bfe725814d3c42433c",
+                "sha256:a06a0425453864a270bc45e71f783330a7428defb4230fb5e6a731fde06ecd45"
             ],
             "index": "pypi",
-            "version": "==5.4.1"
+            "version": "==7.1.2"
         },
         "six": {
             "hashes": [
-                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
-                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
+                "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"
             ],
-            "index": "pypi",
-            "version": "==1.14.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.16.0"
         },
         "toml": {
             "hashes": [
-                "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c",
-                "sha256:235682dd292d5899d361a811df37e04a8828a5b1da3115886b73cf81ebc9100e",
-                "sha256:f1db651f9657708513243e61e6cc67d101a39bad662eaa9b5546f789338e07a3"
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
             ],
-            "index": "pypi",
-            "version": "==0.10.0"
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==0.10.2"
+        },
+        "tomli": {
+            "hashes": [
+                "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc",
+                "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==2.0.1"
         },
         "tox": {
             "hashes": [
-                "sha256:a4a6689045d93c208d77230853b28058b7513f5123647b67bf012f82fa168303",
-                "sha256:b2c4b91c975ea5c11463d9ca00bebf82654439c5df0f614807b9bdec62cc9471"
+                "sha256:c138327815f53bc6da4fe56baec5f25f00622ae69ef3fe4e1e385720e22486f9",
+                "sha256:c38e15f4733683a9cc0129fba078633e07eb0961f550a010ada879e95fb32632"
             ],
             "index": "pypi",
-            "version": "==3.14.6"
+            "version": "==3.25.1"
+        },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:25642c956049920a5aa49edcdd6ab1e06d7e5d467fc00e0506c44ac86fbfca02",
+                "sha256:e6d2677a32f47fc7eb2795db1dd15c1f34eff616bcaf2cfb5e997f854fa1c4a6"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==4.3.0"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:5021396e8f03d0d002a770da90e31e61159684db2859d0ba4850fbea752aa675",
-                "sha256:ac53ade75ca189bc97b6c1d9ec0f1a50efe33cbf178ae09452dcd9fd309013c1"
+                "sha256:288171134a2ff3bfb1a2f54f119e77cd1b81c29fc1265a2356f3e8d14c7d58c4",
+                "sha256:b30aefac647e86af6d82bfc944c556f8f1a9c90427b2fb4e3bfbf338cb82becf"
             ],
-            "index": "pypi",
-            "version": "==20.0.18"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==20.15.1"
         },
         "zipp": {
             "hashes": [
-                "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b",
-                "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"
+                "sha256:05b45f1ee8f807d0cc928485ca40a07cb491cf092ff587c0df9cb1fd154848d2",
+                "sha256:47c40d7fe183a6f21403a199b3e4192cca5774656965b0a4988ad2f8feb5f009"
             ],
-            "index": "pypi",
-            "version": "==3.1.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==3.8.1"
         }
     }
 }
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 6b3431c..31b58d9 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,26 +1,24 @@
 -i https://pypi.org/simple
-appdirs==1.4.3
-atomicwrites==1.3.0 ; sys_platform == 'win32'
-attrs==19.3.0
-colorama==0.4.3 ; platform_system == 'Windows'
-coverage==5.1
-distlib==0.3.0
-entrypoints==0.3
-filelock==3.0.12
-flake8==3.7.9
-importlib-metadata==1.6.0 ; python_version < '3.8'
+attrs==21.4.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+coverage==6.4.2
+distlib==0.3.5
+filelock==3.7.1; python_version >= '3.7'
+flake8==3.9.2
+importlib-metadata==4.12.0; python_version < '3.8'
+iniconfig==1.1.1
 mccabe==0.6.1
-more-itertools==8.2.0
-packaging==20.3
-pluggy==0.13.1
-py==1.8.1
-pycodestyle==2.5.0
-pyflakes==2.1.1
-pyparsing==2.4.7
-pytest==5.4.1
-six==1.14.0
-toml==0.10.0
-tox==3.14.6
-virtualenv==20.0.18
-wcwidth==0.1.9
-zipp==3.1.0
+packaging==21.3; python_version >= '3.6'
+platformdirs==2.5.2; python_version >= '3.7'
+pluggy==1.0.0; python_version >= '3.6'
+py==1.11.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+pycodestyle==2.7.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+pyflakes==2.3.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+pyparsing==3.0.9; python_full_version >= '3.6.8'
+pytest==7.1.2
+six==1.16.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+toml==0.10.2; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
+tomli==2.0.1; python_version >= '3.7'
+tox==3.25.1
+typing-extensions==4.3.0; python_version < '3.8'
+virtualenv==20.15.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
+zipp==3.8.1; python_version >= '3.7'
diff --git a/requirements.txt b/requirements.txt
index 1e09dff..409f3c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,5 @@
 -i https://pypi.org/simple
-click==7.1.2
+click==8.1.3
+importlib-metadata==4.12.0; python_version < '3.8'
+typing-extensions==4.3.0; python_version < '3.8'
+zipp==3.8.1; python_version >= '3.7'