Update to ESLint v6

Add new rules and convert config file to JSON.

.eslintrc.json

@@ -1,4 +1,4 @@
 {
   "root": true,
-  "extends": "./index.js"
+  "extends": "./config.json"
 }

LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Nathan Woltman
+Copyright (c) 2018-present Nathan Woltman
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

config.json

@@ -0,0 +1,219 @@
+{
+  "parserOptions": {
+    "ecmaVersion": 2020
+  },
+  "env": {
+    "es6": true,
+    "node": true
+  },
+  "reportUnusedDisableDirectives": true,
+  "rules": {
+    "array-bracket-newline": [2, "consistent"], // Would prefer {"multiline": true}, but it doesn't allow 1 property
+    "array-bracket-spacing": 2,
+    "array-callback-return": 2,
+    "array-element-newline": [2, "consistent"],
+    "arrow-parens": [2, "as-needed", {"requireForBlockBody": true}],
+    "arrow-spacing": 2,
+    "block-scoped-var": 2,
+    "block-spacing": 2,
+    "brace-style": 2,
+    "camelcase": 2,
+    "class-methods-use-this": 1,
+    "comma-dangle": [2, {
+      "arrays": "always-multiline",
+      "objects": "always-multiline",
+      "imports": "always-multiline",
+      "exports": "always-multiline",
+      "functions": "only-multiline"
+    }],
+    "comma-spacing": 2,
+    "comma-style": 2,
+    "computed-property-spacing": [2, "never", {"enforceForClassMembers": true}],
+    "consistent-return": 2,
+    "constructor-super": 2,
+    "curly": 2,
+    "default-param-last": 1,
+    "dot-location": [2, "property"],
+    "dot-notation": 2,
+    "eol-last": 2,
+    "eqeqeq": 2,
+    "for-direction": 2,
+    "func-call-spacing": 2,
+    "func-style": [2, "declaration", {"allowArrowFunctions": true}],
+    "function-call-argument-newline": [2, "consistent"],
+    "function-paren-newline": [2, "multiline-arguments"],
+    "generator-star-spacing": [2, {
+      "before": false,
+      "after": true,
+      "method": {"before": true, "after": false}
+    }],
+    "getter-return": 2,
+    "handle-callback-err": [2, "^(?:err(?:or)?)$"],
+    "id-blacklist": [2, "data"],
+    "indent": [2, 2, {"SwitchCase": 1}],
+    "key-spacing": 2,
+    "keyword-spacing": 2,
+    "lines-around-directive": [2, {"before": "never", "after": "always"}],
+    "lines-between-class-members": [2, "always", {"exceptAfterSingleLine": true}],
+    "max-len": [2, {
+      "code": 100,
+      "ignorePattern": "^import |^const \\w+ = require\\(",
+      "ignoreUrls": true,
+      "ignoreRegExpLiterals": true
+    }],
+    "max-nested-callbacks": [2, 3],
+    "multiline-ternary": [2, "always-multiline"],
+    "new-cap": 2,
+    "new-parens": 2,
+    "no-array-constructor": 2,
+    "no-async-promise-executor": 2,
+    "no-await-in-loop": 2,
+    "no-buffer-constructor": 2,
+    "no-case-declarations": 2,
+    "no-class-assign": 2,
+    "no-compare-neg-zero": 2,
+    "no-confusing-arrow": 2,
+    "no-console": 2,
+    "no-const-assign": 2,
+    "no-constant-condition": 2,
+    "no-control-regex": 2,
+    "no-delete-var": 2,
+    "no-dupe-class-members": 2,
+    "no-dupe-keys": 2,
+    "no-duplicate-case": 2,
+    "no-else-return": 2,
+    "no-empty": 2,
+    "no-empty-character-class": 2,
+    "no-empty-function": 2,
+    "no-empty-pattern": 2,
+    "no-eval": 2,
+    "no-ex-assign": 2,
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-extra-boolean-cast": 2,
+    "no-extra-label": 2,
+    "no-extra-semi": 2,
+    "no-fallthrough": 2,
+    "no-floating-decimal": 2,
+    "no-func-assign": 2,
+    "no-import-assign": 2,
+    "no-invalid-regexp": 2,
+    "no-irregular-whitespace": [2, {"skipStrings": false}],
+    "no-label-var": 2,
+    "no-labels": [2, {"allowLoop": true}],
+    "no-lone-blocks": 2,
+    "no-lonely-if": 2,
+    "no-loop-func": 2,
+    "no-misleading-character-class": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-multi-spaces": 2,
+    "no-multi-str": 2,
+    "no-multiple-empty-lines": [2, {"max": 2, "maxBOF": 0, "maxEOF": 1}],
+    "no-negated-condition": 1,
+    "no-nested-ternary": 2,
+    "no-new": 2,
+    "no-new-object": 2,
+    "no-new-require": 2,
+    "no-new-symbol": 2,
+    "no-new-wrappers": 2,
+    "no-octal-escape": 2,
+    "no-path-concat": 2,
+    "no-proto": 2,
+    "no-redeclare": [2, {"builtinGlobals": true}],
+    "no-regex-spaces": 2,
+    "no-return-assign": [2, "always"],
+    "no-return-await": 2,
+    "no-self-assign": 2,
+    "no-self-compare": 2,
+    "no-sequences": 2,
+    "no-shadow": [2, {"allow": ["err"], "builtinGlobals": true}],
+    "no-shadow-restricted-names": 2,
+    "no-sparse-arrays": 2,
+    "no-sync": [2, {"allowAtRootLevel": true}],
+    "no-tabs": 2,
+    "no-template-curly-in-string": 2,
+    "no-this-before-super": 2,
+    "no-throw-literal": 2,
+    "no-trailing-spaces": 2,
+    "no-undef": 2,
+    "no-undef-init": 2,
+    "no-unexpected-multiline": 2,
+    "no-unmodified-loop-condition": 2,
+    "no-unneeded-ternary": [2, {"defaultAssignment": true}],
+    "no-unreachable": 2,
+    "no-unsafe-finally": 2,
+    "no-unsafe-negation": 2,
+    "no-unused-expressions": [2, {"allowShortCircuit": true}],
+    "no-unused-labels": 2,
+    "no-unused-vars": [2, {"ignoreRestSiblings": true}],
+    "no-use-before-define": [2, {"functions": false}],
+    "no-useless-call": 2,
+    "no-useless-catch": 2,
+    "no-useless-computed-key": 2,
+    "no-useless-concat": 2,
+    "no-useless-escape": 2,
+    "no-useless-rename": 2,
+    "no-useless-return": 2,
+    "no-void": 2,
+    "no-warning-comments": 1,
+    "no-whitespace-before-property": 2,
+    "no-with": 2,
+    "object-curly-newline": [2, {"consistent": true}], // Would prefer "multiline", but it doesn't allow 1 property
+    "object-curly-spacing": 2,
+    "object-property-newline": [2, {"allowAllPropertiesOnSameLine": true}],
+    "object-shorthand": 2,
+    "one-var": [2, "never"],
+    "one-var-declaration-per-line": 2,
+    "operator-assignment": 2,
+    "operator-linebreak": 2,
+    "padded-blocks": [2, "never"],
+    "padding-line-between-statements": [2,
+      {"blankLine": "always", "prev": "*", "next": "class"},
+      {"blankLine": "always", "prev": "class", "next": "*"},
+      {"blankLine": "always", "prev": "*", "next": "function"},
+      {"blankLine": "always", "prev": "function", "next": "*"}
+    ],
+    "prefer-arrow-callback": [2, {"allowNamedFunctions": true}],
+    "prefer-const": 2,
+    "prefer-destructuring": [2, {
+      "VariableDeclarator": {"array": false, "object": true},
+      "AssignmentExpression": {"array": false, "object": false}
+    }],
+    "prefer-numeric-literals": 2,
+    "prefer-promise-reject-errors": 2,
+    "prefer-regex-literals": 2,
+    "prefer-rest-params": 2,
+    "prefer-spread": 2,
+    "quote-props": [2, "as-needed"],
+    "quotes": [2, "single", {"avoidEscape": true}],
+    "require-atomic-updates": 2,
+    "require-await": 2,
+    "require-yield": 2,
+    "rest-spread-spacing": 2,
+    "semi": 2,
+    "semi-spacing": 2,
+    "semi-style": 2,
+    "space-before-blocks": 2,
+    "space-before-function-paren": [2, {
+      "anonymous": "never",
+      "named": "never",
+      "asyncArrow": "always"
+    }],
+    "space-in-parens": 2,
+    "space-infix-ops": 2,
+    "space-unary-ops": 2,
+    "spaced-comment": [2, "always", {
+      "block": {"balanced": true}
+    }],
+    "strict": [2, "global"],
+    "switch-colon-spacing": 2,
+    "symbol-description": 1,
+    "template-curly-spacing": 2,
+    "template-tag-spacing": 2,
+    "use-isnan": 2,
+    "valid-typeof": 2,
+    "wrap-iife": [2, "inside"],
+    "yield-star-spacing": 2,
+    "yoda": [2, "never", {"exceptRange": true}]
+  }
+}