chore: migrate to esm (#334)

* chore: update unit tests

* fix: follow latest action template

* chore: add licenses and workflows

* chore: remove bloat

* chore: fix linter

eslint.config.mjs

@@ -1,96 +1,81 @@
-import {defineConfig, globalIgnores} from 'eslint/config'
-import github from 'eslint-plugin-github'
-import jest from 'eslint-plugin-jest'
-import stylistic from '@stylistic/eslint-plugin'
+// See: https://eslint.org/docs/latest/use/configure/configuration-files
+
+import { fixupPluginRules } from '@eslint/compat'
+import { FlatCompat } from '@eslint/eslintrc'
+import js from '@eslint/js'
 import typescriptEslint from '@typescript-eslint/eslint-plugin'
-import globals from 'globals'
 import tsParser from '@typescript-eslint/parser'
+import _import from 'eslint-plugin-import'
+import jest from 'eslint-plugin-jest'
+import prettier from 'eslint-plugin-prettier'
+import globals from 'globals'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
 
-export default defineConfig([
-  globalIgnores([
-    '**/dist/',
-    '**/lib/',
-    '**/node_modules/',
-    '**/eslint.config.mjs',
-    '**/jest.config.js'
-  ]),
-  github.getFlatConfigs().recommended,
+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: ['**/coverage', '**/dist', '**/linter', '**/node_modules']
+  },
+  ...compat.extends(
+    'eslint:recommended',
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'plugin:jest/recommended',
+    'plugin:prettier/recommended'
+  ),
   {
-    files: ['src/**/*.ts'],
-
     plugins: {
+      import: fixupPluginRules(_import),
       jest,
-      '@stylistic': stylistic,
+      prettier,
       '@typescript-eslint': typescriptEslint
     },
 
     languageOptions: {
       globals: {
         ...globals.node,
-        ...jest.environments.globals.globals
+        ...globals.jest,
+        Atomics: 'readonly',
+        SharedArrayBuffer: 'readonly'
       },
 
       parser: tsParser,
-      ecmaVersion: 9,
+      ecmaVersion: 2023,
       sourceType: 'module',
 
       parserOptions: {
-        project: './tsconfig.json'
+        project: ['tsconfig.eslint.json'],
+        tsconfigRootDir: '.'
+      }
+    },
+
+    settings: {
+      'import/resolver': {
+        typescript: {
+          alwaysTryTypes: true,
+          project: 'tsconfig.eslint.json'
+        }
       }
     },
 
     rules: {
-      'i18n-text/no-en': 'off',
-      'eslint-comments/no-use': 'off',
-      'import/no-namespace': 'off',
-      'no-unused-vars': 'off',
-      '@typescript-eslint/no-unused-vars': 'error',
-
-      '@typescript-eslint/explicit-member-accessibility': [
-        'error',
-        {
-          accessibility: 'no-public'
-        }
-      ],
-
-      '@typescript-eslint/no-require-imports': 'error',
-      '@typescript-eslint/array-type': 'error',
-      '@typescript-eslint/await-thenable': 'error',
-      '@typescript-eslint/ban-ts-comment': 'error',
       camelcase: 'off',
-      '@typescript-eslint/consistent-type-assertions': 'error',
-
-      '@typescript-eslint/explicit-function-return-type': [
-        'error',
-        {
-          allowExpressions: true
-        }
-      ],
-
-      '@stylistic/function-call-spacing': ['error', 'never'],
-      '@typescript-eslint/no-array-constructor': 'error',
-      '@typescript-eslint/no-empty-interface': 'error',
-      '@typescript-eslint/no-explicit-any': 'error',
-      '@typescript-eslint/no-extraneous-class': 'error',
-      '@typescript-eslint/no-for-in-array': 'error',
-      '@typescript-eslint/no-inferrable-types': 'error',
-      '@typescript-eslint/no-misused-new': 'error',
-      '@typescript-eslint/no-namespace': 'error',
-      '@typescript-eslint/no-non-null-assertion': 'warn',
-      '@typescript-eslint/no-unnecessary-qualifier': 'error',
-      '@typescript-eslint/no-unnecessary-type-assertion': 'error',
-      '@typescript-eslint/no-useless-constructor': 'error',
-      '@typescript-eslint/no-var-requires': 'error',
-      '@typescript-eslint/prefer-for-of': 'warn',
-      '@typescript-eslint/prefer-function-type': 'warn',
-      '@typescript-eslint/prefer-includes': 'error',
-      '@typescript-eslint/prefer-string-starts-ends-with': 'error',
-      '@typescript-eslint/promise-function-async': 'error',
-      '@typescript-eslint/require-array-sort-compare': 'error',
-      '@typescript-eslint/restrict-plus-operands': 'error',
-      '@stylistic/semi': ['error', 'never'],
-      '@stylistic/type-annotation-spacing': 'error',
-      '@typescript-eslint/unbound-method': 'error'
+      'eslint-comments/no-use': 'off',
+      'eslint-comments/no-unused-disable': 'off',
+      'i18n-text/no-en': 'off',
+      'import/no-namespace': 'off',
+      'no-console': 'off',
+      'no-shadow': 'off',
+      'no-unused-vars': 'off',
+      'prettier/prettier': 'error'
     }
   }
-])
+]