chore: use flat config (#111)

eslint.config.js

@@ -0,0 +1,35 @@
+// @ts-check
+
+import eslint from '@eslint/js'
+import tseslint from 'typescript-eslint'
+import vitest from 'eslint-plugin-vitest'
+import eslintConfigPrettier from 'eslint-config-prettier'
+
+export default tseslint.config(
+  {
+    languageOptions: {
+      sourceType: 'module'
+    },
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error'
+    }
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.stylistic,
+  {
+    rules: {
+      '@typescript-eslint/member-delimiter-style': 'off',
+      '@typescript-eslint/consistent-type-imports': 'error',
+      '@typescript-eslint/consistent-type-definitions': ['error', 'type']
+    }
+  },
+  {
+    files: ['test/**'],
+    ...vitest.configs.recommended
+  },
+  eslintConfigPrettier,
+  {
+    ignores: ['dist/**', 'test/fixtures/**']
+  }
+)

package.json

@@ -43,12 +43,13 @@
   "devDependencies": {
     "@changesets/changelog-github": "^0.5.0",
     "@changesets/cli": "^2.27.1",
+    "@eslint/js": "^9.1.1",
     "@polka/url": "^1.0.0-next.25",
+    "@types/eslint-config-prettier": "^6.11.3",
+    "@types/eslint__js": "^8.42.3",
     "@types/fs-extra": "^11.0.4",
     "@types/node": "^20.12.7",
     "@types/throttle-debounce": "^5.0.2",
-    "@typescript-eslint/eslint-plugin": "^7.8.0",
-    "@typescript-eslint/parser": "^7.8.0",
     "eslint": "^8.57.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-vitest": "^0.5.4",
@@ -58,6 +59,7 @@
     "throttle-debounce": "^5.0.0",
     "tsup": "^8.0.2",
     "typescript": "^5.4.5",
+    "typescript-eslint": "^7.8.0",
     "vite": "^5.2.10",
     "vitest": "^1.5.3",
     "vitest-github-actions-reporter": "^0.11.1"