diff --git a/.eslintrc.js b/.eslintrc.js
index ce27f79..d1cc01a 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,25 +1,15 @@
 module.exports = {
-    "env": {
-        "es6": true,
-        "node": true
+    root: true,
+    env: {
+        es6: true,
+        node: true,
     },
-    "extends": "eslint:recommended",
-    "rules": {
-        "indent": [
-            "error",
-            4
-        ],
-        "linebreak-style": [
-            "error",
-            "unix"
-        ],
-        "quotes": [
-            "error",
-            "single"
-        ],
-        "semi": [
-            "error",
-            "always"
-        ]
-    }
-};
\ No newline at end of file
+    extends: 'eslint:recommended',
+    rules: {
+        indent: ['error', 4],
+        'linebreak-style': ['error', 'unix'],
+        quotes: ['error', 'single'],
+        semi: ['error', 'always'],
+    },
+};
+
diff --git a/package-lock.json b/package-lock.json
index 2110972..c9f62fa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,70 +4,129 @@
   "lockfileVersion": 1,
   "requires": true,
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-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
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-      "dev": true
+    "@babel/code-frame": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.10.4.tgz",
+      "integrity": "sha512-vG6SvB6oYEhvgisZNFRmRCUkLz11c7rp+tbNTynGqc6mS1d5ATd/sGyV6W0KZZnXRKMTzZDRgQT3Ou9jhpAfUg==",
+      "dev": true,
+      "requires": {
+        "@babel/highlight": "^7.10.4"
+      }
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-    "acorn": {
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-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.1.tgz",
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+    "@babel/helper-validator-identifier": {
+      "version": "7.10.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.4.tgz",
+      "integrity": "sha512-3U9y+43hz7ZM+rzG24Qe2mufW5KhvFg/NhnNph+i9mgCtdTCtMJuI1TMkrIUiK7Ix4PYlRF9I5dhqaLYA/ADXw==",
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-      "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
+    "@babel/highlight": {
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+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.10.4.tgz",
+      "integrity": "sha512-i6rgnR/YgPEQzZZnbTHHuZdlE8qyoBNalD6F+q4vAFlcMEcqmkoG+mPqJYJCo63qPf74+Y1UZsl3l6f7/RIkmA==",
       "dev": true,
       "requires": {
-        "acorn": "3.3.0"
+        "@babel/helper-validator-identifier": "^7.10.4",
+        "chalk": "^2.0.0",
+        "js-tokens": "^4.0.0"
       },
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-        "acorn": {
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-          "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo=",
-          "dev": true
+        "chalk": {
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+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
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+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
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-      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
+    "@eslint/eslintrc": {
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+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.1.3.tgz",
+      "integrity": "sha512-4YVwPkANLeNtRjMekzux1ci8hIaH5eGKktGqR0d3LWsKNn5B2X/1Z6Trxy7jQXl9EBGE6Yj02O+t09FMeRllaA==",
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-        "fast-deep-equal": "1.1.0",
-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "ajv": "^6.12.4",
+        "debug": "^4.1.1",
+        "espree": "^7.3.0",
+        "globals": "^12.1.0",
+        "ignore": "^4.0.6",
+        "import-fresh": "^3.2.1",
+        "js-yaml": "^3.13.1",
+        "lodash": "^4.17.19",
+        "minimatch": "^3.0.4",
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-      "integrity": "sha1-YXmX/F9gV2iUxDX5QNgZ4TW4B2I=",
+    "@types/minimatch": {
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+      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
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+    "abbrev": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
+      "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==",
+      "dev": true
+    },
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+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
+      "integrity": "sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A==",
+      "dev": true
+    },
+    "acorn-jsx": {
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.1.tgz",
+      "integrity": "sha512-K0Ptm/47OKfQRpNQ2J/oIN/3QYiK6FwW+eJbILhsdxh2WTLdl+30o8aGdTbm5JbffpFFAg/g+zi1E+jvJha5ng==",
+      "dev": true
+    },
+    "ajv": {
+      "version": "6.12.5",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.5.tgz",
+      "integrity": "sha512-lRF8RORchjpKG50/WFf8xmg7sgCLFiYNNnqdKflk63whMQcWR5ngGjiSXkL9bjxy6B2npOK2HSMN49jEBMSkag==",
+      "dev": true,
+      "requires": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      }
+    },
+    "ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
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-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
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-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-      "dev": true
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "requires": {
+        "color-convert": "^1.9.0"
+      }
+    },
+    "anymatch": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
+      "integrity": "sha512-mM8522psRCqzV+6LhomX5wgp25YVibjh8Wj23I5RPkPppSVSjyKD2A2mBJmWGa+KN7f2D6LNh9jkBCeyLktzjg==",
+      "dev": true,
+      "requires": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      }
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     "argparse": {
       "version": "1.0.10",
@@ -75,46 +134,92 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
       }
     },
+    "arr-diff": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+      "dev": true
+    },
+    "arr-flatten": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
+      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
+      "dev": true
+    },
+    "arr-union": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
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-      "resolved": "https://registry.npmjs.org/array-differ/-/array-differ-0.1.0.tgz",
-      "integrity": "sha1-EuLJtwa+1HyLSDtX5IdHP7CGHzo=",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/array-differ/-/array-differ-3.0.0.tgz",
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-      "integrity": "sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=",
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+        "es-abstract": "^1.17.0-next.1",
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-      "integrity": "sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=",
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+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
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+    "assign-symbols": {
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-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.0.0.tgz",
-      "integrity": "sha1-x/hUOP3UZrx8oWq5DIFRN5el0js="
+      "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
+      "dev": true
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@@ -122,45 +227,77 @@
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-      "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.7.tgz",
-      "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0="
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-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
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 }
diff --git a/package.json b/package.json
index a8ea53d..4b2a533 100644
--- a/package.json
+++ b/package.json
@@ -39,16 +39,18 @@
     "assertXml"
   ],
   "dependencies": {
-    "chai": "^1.9.1",
-    "xml2js": "^0.4.4"
+    "xml2js": "^0.4.23"
+  },
+  "peerDependencies": {
+    "chai": ">=1.10.0 "
   },
   "devDependencies": {
-    "eslint": "^4.18.2",
-    "grunt": "^1.0.2",
-    "grunt-cli": "^1.2.0",
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-    "grunt-mocha-test": "^0.11.0",
-    "load-grunt-tasks": "^0.6.0",
-    "mocha": "^1.21.4"
+    "eslint": "^7.10.0",
+    "grunt": "^1.0.4",
+    "grunt-eslint": "^23.0.0",
+    "grunt-mocha-test": "^0.13.3",
+    "load-grunt-tasks": "^5.1.0",
+    "mocha": "^8.1.3",
+    "chai": "^4.2.0"
   }
 }