Build: use JS for eslint config

- this makes it easier to use this config in esm
  eslint.config.js

.eslintrc.js

@@ -0,0 +1,6 @@
+module.exports = {
+	extends: "./index.js",
+	env: {
+		node: true
+	}
+};

index.js

@@ -0,0 +1,104 @@
+module.exports = {
+	rules: {
+		"no-negated-in-lhs": "error",
+		"no-cond-assign": [ "error", "except-parens" ],
+		curly: [ "error", "all" ],
+		"object-curly-spacing": [ "error", "always" ],
+		"computed-property-spacing": [ "error", "always" ],
+		"array-bracket-spacing": [ "error", "always" ],
+		eqeqeq: [ "error", "smart" ],
+		"no-unused-expressions": "error",
+		"no-sequences": "error",
+		"no-nested-ternary": "error",
+		"no-unreachable": "error",
+		"wrap-iife": [ "error", "inside" ],
+		"no-caller": "error",
+		quotes: [ "error", "double" ],
+		"no-undef": "error",
+		"no-unused-vars": [
+			"error",
+			{
+				args: "all",
+				argsIgnorePattern: "^_"
+			}
+		],
+		"operator-linebreak": [ "error", "after" ],
+		"comma-style": [ "error", "last" ],
+		camelcase: [
+			"error",
+			{
+				properties: "never"
+			}
+		],
+		"dot-notation": [
+			"error",
+			{
+				allowPattern: "^[a-z]+(_[a-z]+)+$"
+			}
+		],
+		"max-len": [
+			"error",
+			{
+				code: 100,
+				ignoreComments: true,
+				ignoreUrls: true,
+				ignoreRegExpLiterals: true
+			}
+		],
+		"no-mixed-spaces-and-tabs": "error",
+		"no-trailing-spaces": "error",
+		"no-irregular-whitespace": "error",
+		"no-multi-str": "error",
+		"comma-dangle": [ "error", "never" ],
+		"comma-spacing": [
+			"error",
+			{
+				before: false,
+				after: true
+			}
+		],
+		"space-before-blocks": [ "error", "always" ],
+		"space-in-parens": [ "error", "always" ],
+		"keyword-spacing": [ 2 ],
+		semi: [ "error", "always" ],
+		"semi-spacing": [
+			"error",
+			{
+
+				// Because of the `for ( ; ...)` requirement
+				// before: true,
+				after: true
+			}
+		],
+		"no-extra-semi": "error",
+		"space-infix-ops": "error",
+		"eol-last": "error",
+		"lines-around-comment": [
+			"error",
+			{
+				beforeLineComment: true
+			}
+		],
+		"linebreak-style": [ "error", "unix" ],
+		"no-with": "error",
+		"brace-style": "error",
+		"space-before-function-paren": [ "error", "never" ],
+		"no-loop-func": "error",
+		"no-spaced-func": "error",
+		"key-spacing": [
+			"error",
+			{
+				beforeColon: false,
+				afterColon: true
+			}
+		],
+		"space-unary-ops": [
+			"error",
+			{
+				words: false,
+				nonwords: false
+			}
+		],
+		"no-multiple-empty-lines": 2
+	}
+};

package.json

@@ -2,7 +2,7 @@
   "name": "eslint-config-jquery",
   "version": "3.0.0",
   "description": "jQuery eslint config",
-  "main": ".eslintrc.json",
+  "main": "index.js",
   "scripts": {
     "test": "eslint test/fixtures/*.js"
   },
@@ -21,7 +21,7 @@
     "eslintconfig"
   ],
   "files": [
-    ".eslintrc.json"
+    "index.js"
   ],
   "author": "Gaidarenko Oleg <markelog@gmail.com>",
   "license": "MIT",

test/fixtures/.eslintrc.js

@@ -0,0 +1,21 @@
+module.exports = {
+	globals: {
+		window: true,
+		define: true,
+		module: true,
+		Symbol: false
+	},
+
+	extends: "../../.eslintrc.js",
+
+	root: true,
+
+	rules: {
+
+		// For the built version
+		// TODO: do not use the built version to check the code
+		"no-multiple-empty-lines": "off",
+		"max-len": "off",
+		"one-var": "off"
+	}
+};