Update to pyqt 5.11.3 for dev-requirments

This is the version of Python3-PyQt5 shipped by Debian Buster.
Updated pip-tools to 4.2 as 3.1 did not work under Buster.

Makefile

@@ -71,7 +71,7 @@ check: clean bandit lint mypy test-random ## Run the full CI test suite
 
 .PHONY: update-pip-requirements
 update-pip-requirements: ## Updates all Python requirements files via pip-compile.
-	pip-compile --generate-hashes --output-file dev-requirements.txt requirements.in dev-requirements.in
+	pip-compile --generate-hashes --allow-unsafe --output-file dev-requirements.txt requirements.in dev-requirements.in
 	pip-compile --generate-hashes --output-file requirements.txt requirements.in
 
 # Explaination of the below shell command should it ever break.

dev-requirements.in

@@ -8,12 +8,12 @@ mccabe==0.6.1
 more-itertools==4.3.0
 mypy==0.701
 mypy-extensions==0.4.1
-pip-tools==3.1.0
+pip-tools==4.2.0
 pluggy==0.13.0
 py==1.7.0
 pycodestyle==2.4.0
 pyflakes==2.0.0
-PyQt5==5.10.1
+PyQt5==5.11.3
 pytest==5.2.1
 pytest-cov==2.8.1
 pytest-mock==1.10.0

dev-requirements.txt

@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile
 # To update, run:
 #
-#    pip-compile --generate-hashes --output-file dev-requirements.txt requirements.in dev-requirements.in
+#    pip-compile --allow-unsafe --generate-hashes --output-file=dev-requirements.txt dev-requirements.in requirements.in
 #
 alembic==1.0.2 \
     --hash=sha256:04bcb970ca8659c3607ddd8ffd86cc9d6a99661c9bc590955e8813c66bfa582b
@@ -108,9 +108,9 @@ packaging==19.2 \
 pathlib2==2.3.2 \
     --hash=sha256:8eb170f8d0d61825e09a95b38be068299ddeda82f35e96c3301a8a5e7604cb83 \
     --hash=sha256:d1aa2a11ba7b8f7b21ab852b1fb5afb277e1bb99d5dfc663380b5015c0d80c5a
-pip-tools==3.1.0 \
-    --hash=sha256:31b43e5f8d605fc84f7506199025460abcb98a29d12cc99db268f73e39cf55e5 \
-    --hash=sha256:b1ceca03b4a48346b2f6870565abb09d8d257d5b1524b4c6b222185bf26c3870
+pip-tools==4.2.0 \
+    --hash=sha256:123174aabf7f4a63dd6e0bfc8aeeb5eaddbecb75a41e9f0dd4c447b1f2de14f7 \
+    --hash=sha256:5427ea4dcc175649723985fbcace9b2d8f46f9adbcc63bc2d7b247d9bcc74917
 pluggy==0.13.0 \
     --hash=sha256:0db4b7601aae1d35b4a033282da476845aa19185c1e6964b25cf324b5e4ec3e6 \
     --hash=sha256:fa5fa1622fa6dd5c030e9cad086fa19ef6a0cf6d7a2d12318e10cb49d6d68f34
@@ -127,11 +127,29 @@ pyparsing==2.4.2 \
     --hash=sha256:6f98a7b9397e206d78cc01df10131398f1c8b8510a2f4d97d9abd82e1aacdd80 \
     --hash=sha256:d9338df12903bbf5d65a0e4e87c2161968b10d2e489652bb47001d82a9b028b4 \
     # via packaging
-pyqt5==5.10.1 \
-    --hash=sha256:1e652910bd1ffd23a3a48c510ecad23a57a853ed26b782cd54b16658e6f271ac \
-    --hash=sha256:4db7113f464c733a99fcb66c4c093a47cf7204ad3f8b3bda502efcc0839ac14b \
-    --hash=sha256:9c17ab3974c1fc7bbb04cc1c9dae780522c0ebc158613f3025fccae82227b5f7 \
-    --hash=sha256:f6035baa009acf45e5f460cf88f73580ad5dc0e72330029acd99e477f20a5d61
+pyqt5-sip==4.19.19 \
+    --hash=sha256:304acf771b6033cb4bafc415939d227c91265d30664ed643b298d7e95f509f81 \
+    --hash=sha256:39d2677f4de46ed4d7aa3b612f31c74c881975efe51c6a23fbb1d9382e4cc850 \
+    --hash=sha256:54b99a3057e8f01b90d49cca9ca566b1ea23d8920038760f44e75b90c62b9d5f \
+    --hash=sha256:59f5332f86f3ccd3ac94674fe91eae6e8aca26da7c6588917cabd0fe22af106d \
+    --hash=sha256:72be07a21b0f379987c4ec59bc86834a9719a2f9cfb49606a4d4e34dae9aa549 \
+    --hash=sha256:7b3b8c015e545fa30e42205fc1115b7c6afcb6acec790ce3f330a06323730523 \
+    --hash=sha256:7fbb6389c20aff4c3257e89bb1787effffcaf05c32d937c00094ae45846bffd5 \
+    --hash=sha256:828d9911acc483672a2bae1cc1bf79f591eb3338faad1f2c798aa2f45459a318 \
+    --hash=sha256:a9460dac973deccc6ff2d90f18fd105cbaada147f84e5917ed79374dcb237758 \
+    --hash=sha256:aade50f9a1b9d20f6aabe88e8999b10db57218f5c31950160f3f7957dd64e07c \
+    --hash=sha256:ac9e5b282d1f0771a8310ed974afe1961ec31e9ae787d052c0e504ea46ae323a \
+    --hash=sha256:ba41bd21b89c6713f7077b5f7d4a1c452989190aad5704e215560a266a1ecbab \
+    --hash=sha256:c309dbbd6c155e961bfd6893496afa5cd184cce6f7dffd87ea68ee048b6f97e1 \
+    --hash=sha256:cfc21b1f80d4655ffa776c505a2576b4d148bbc52bb3e33fedbf6cfbdbc09d1b \
+    --hash=sha256:d7b26e0b6d81bf14c1239e6a891ac1303a7e882512d990ec330369c7269226d7 \
+    --hash=sha256:f8b7a3e05235ce58a38bf317f71a5cb4ab45d3b34dc57421dd8cea48e0e4023e \
+    # via pyqt5
+pyqt5==5.11.3 \
+    --hash=sha256:517e4339135c4874b799af0d484bc2e8c27b54850113a68eec40a0b56534f450 \
+    --hash=sha256:ac1eb5a114b6e7788e8be378be41c5e54b17d5158994504e85e43b5fca006a39 \
+    --hash=sha256:d2309296a5a79d0a1c0e6c387c30f0398b65523a6dcc8a19cc172e46b949e00d \
+    --hash=sha256:e85936bae1581bcb908847d2038e5b34237a5e6acc03130099a78930770e7ead
 pytest-cov==2.8.1 \
     --hash=sha256:cc6742d8bac45070217169f5f72ceee1e0e55b0221f54bcf24845972d3a47f2b \
     --hash=sha256:cdbdef4f870408ebdbfeb44e63e07eb18bb4619fae852f6e760645fa36172626
@@ -210,3 +228,9 @@ zipp==0.6.0 \
     --hash=sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e \
     --hash=sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335 \
     # via importlib-metadata
+
+# The following packages are considered to be unsafe in a requirements file:
+setuptools==42.0.1 \
+    --hash=sha256:409547a87530bd8a20582a2f0996c2a6651c5855b3a614af05020b35c3867dcb \
+    --hash=sha256:be5c1ea910cd1f37d1dd79b5f74b68b359348f558fbe4866b15f54a052d61ee1 \
+    # via flake8