Update dependencies and remove unneeded things. This allows building on node v22. Also rely on configs for eslint/prettier so CI and command line runs are guaranteed to be consistent.

eslint.config.mjs

@@ -0,0 +1,64 @@
+import globals from 'globals';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import js from '@eslint/js';
+import { FlatCompat } from '@eslint/eslintrc';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+export default [
+  {
+    ignores: [
+      'eslint.config.mjs',
+      'webpack.config.cjs',
+      '**/CookieMonster.user.js',
+      'dist/*',
+      'node_modules/*',
+    ],
+  },
+  ...compat.extends('airbnb-base', 'prettier'),
+  {
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        Game: 'writable',
+        l: 'readonly',
+        b64_to_utf8: 'readonly',
+        utf8_to_b64: 'readonly',
+        BeautifyAll: 'readonly',
+      },
+
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+    },
+
+    rules: {
+      'import/extensions': ['error', 'ignorePackages'],
+      'import/no-mutable-exports': 'off',
+      'no-import-assign': 'off',
+
+      'no-plusplus': [
+        'error',
+        {
+          allowForLoopAfterthoughts: true,
+        },
+      ],
+
+      'func-names': 'off',
+
+      'prefer-destructuring': [
+        'error',
+        {
+          object: true,
+          array: false,
+        },
+      ],
+    },
+  },
+];