Introduce new style rules

.eslintrc.json → .eslintrc.js

-{
-    "env": {
-        "es2021": true,
-        "node": true
+"use strict";
+module.exports = {
+    env: {
+        es2021: true,
+        node: true,
     },
-    "extends": "eslint:recommended",
-    "parserOptions": {
-        "sourceType": "script",
-        "ecmaVersion": 2022
+    extends: "eslint:recommended",
+    parserOptions: {
+        sourceType: "script",
+        ecmaVersion: 2022,
     },
-    "rules": {
-        "indent": [
+    rules: {
+        // Annoyances
+        "no-inner-declarations": "off",
+        "no-useless-escape": "warn",
+        "require-atomic-updates": "off",
+        "linebreak-style": "off",
+
+        // Performance/consistency
+        "eqeqeq": [
             "error",
-            4
+            "always",
+            {
+                "null": "ignore",
+            },
         ],
-        "linebreak-style": "off",
-        "quotes": [
+        "strict": [
             "error",
-            "double"
+            "global",
         ],
-        "semi": [
+        "no-var": ["error"],
+        "prefer-const": ["warn"],
+        "prefer-template": ["error"],
+
+        // Stylistic
+        "array-element-newline": [
             "error",
-            "always"
+            "consistent",
         ],
-        "no-inner-declarations": "off",
-        "no-useless-escape": "off",
-        "require-atomic-updates": "off",
-        "strict": [
+        "comma-dangle": ["error", "always-multiline"],
+        "comma-style": ["error", "last"],
+        "indent": [
             "error",
-            "global"
+            4,
         ],
-        "eqeqeq": [
+        "quotes": [
+            "error",
+            "double",
+        ],
+        "semi": [
             "error",
             "always",
-            {
-                "null": "ignore"
-            }
         ],
         "no-empty": [
             "error",
             {
-                "allowEmptyCatch": true
-            }
+                "allowEmptyCatch": true,
+            },
         ],
         "no-extra-parens": "error",
         "brace-style": [ 
             "error", 
-            "1tbs"
+            "1tbs",
         ],
         "object-curly-spacing": [ 
             "error",
-            "always"
-        ]
+            "always",
+        ],
+        "eol-last": ["warn", "always"],
+        "key-spacing": ["error"],
+        "keyword-spacing": ["error"],
+        "lines-between-class-members": ["error"],
+        "newline-per-chained-call": ["warn"],
+        "no-unneeded-ternary": ["warn"],
+        "prefer-object-spread": ["warn"],
+        "semi-spacing": ["error"],
+        "space-before-blocks": ["error", "always"],
+        "spaced-comment": ["error", "always"],
+        "arrow-body-style": ["warn", "as-needed"],
+        "arrow-spacing": ["error"],
+    },
+    globals: {
+        "BigInt": true,
     },
-    "globals": {
-        "BigInt": true
-    }
-}
+};
\ No newline at end of file

index.js

-module.exports = require("./.eslintrc.json");
+"use strict";
\ No newline at end of file
+module.exports = require("./.eslintrc.js");

package.json

 {
   "name": "@tt-bot-dev/eslint-config",
-  "version": "1.0.4",
+  "version": "1.1.0",
   "description": "The ESLint configuration used across all tt-bot-dev repositories.",
   "main": "index.js",
   "scripts": {