ci: add stricter linting

eslint.config.mjs

@@ -1,28 +1,40 @@
 // @ts-check
 
 import { readdirSync } from 'fs';
-import { join } from 'path';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
 
 import eslint from '@eslint/js';
 import perfectionist from 'eslint-plugin-perfectionist';
 import tseslint from 'typescript-eslint';
 
-const { dirname } = import.meta;
-const baseDir = join(dirname, 'src');
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+const baseDir = join(__dirname, 'src');
 const internalDirectories = readdirSync(baseDir, {
   withFileTypes: true,
 }).flatMap((dirent) => (dirent.isDirectory() ? dirent.name : []));
 
+console.log({
+  __dirname,
+  importMetaDirname: import.meta.dirname,
+  equal: __dirname === import.meta.dirname,
+});
+
 export default tseslint.config(
   eslint.configs.recommended,
   tseslint.configs.strictTypeChecked,
   tseslint.configs.stylisticTypeChecked,
   {
     languageOptions: {
-      parserOptions: { tsconfigRootDir: dirname, projectService: true },
+      parserOptions: {
+        tsconfigRootDir: import.meta.dirname,
+        projectService: true,
+      },
     },
   },
-  { ignores: ['build', 'deprecated'] },
+  { files: ['**/*.mjs'], extends: [tseslint.configs.disableTypeChecked] },
+  { ignores: ['build', 'coverage', 'deprecated'] },
   {
     rules: {
       eqeqeq: 'error',