chore: upgrade to eslint 9

eslint.config.js

@@ -0,0 +1,10 @@
+// @ts-check
+import eslint from '@eslint/js'
+import tslint from 'typescript-eslint'
+import plugin from 'eslint-plugin-eslint-plugin'
+
+export default tslint.config(
+  eslint.configs.recommended,
+  ...tslint.configs.recommended,
+  plugin.configs['flat/recommended'],
+)

package.json

@@ -40,7 +40,7 @@
   ],
   "scripts": {
     "generate": "node --loader ts-node/esm/transpile-only ./src/scripts/generate/index.ts",
-    "lint": "ESLINT_USE_FLAT_CONFIG=false eslint . --fix",
+    "lint": "eslint . --fix",
     "markdownlint": "markdownlint .",
     "prepare": "husky install",
     "spellcheck": "cspell lint --relative --no-progress '**'",
@@ -56,21 +56,14 @@
   "devDependencies": {
     "@changesets/cli": "^2.27.1",
     "@commitlint/config-conventional": "^19.2.2",
+    "@eslint/js": "^9.0.0",
     "@masknet/config": "^0.2.1",
     "@types/glob": "^8.1.0",
-    "@types/prettier": "^3.0.0",
-    "@typescript-eslint/eslint-plugin": "^7.6.0",
-    "@typescript-eslint/parser": "^7.6.0",
-    "@typescript-eslint/types": "^7.6.0",
-    "@typescript-eslint/utils": "^7.6.0",
     "commitlint": "^19.2.2",
     "cspell": "^8.7.0",
     "eslint": "^9.0.0",
-    "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-eslint-plugin": "^6.0.0",
     "eslint-plugin-import": "^2.29.1",
-    "eslint-plugin-unicorn": "^52.0.0",
-    "eslint-plugin-unused-imports": "^3.1.0",
     "glob": "^10.3.12",
     "globals": "^15.0.0",
     "husky": "^9.0.11",
@@ -81,6 +74,7 @@
     "ts-dedent": "^2.2.0",
     "ts-node": "^10.9.2",
     "typescript": "^5.4.5",
+    "typescript-eslint": "^7.6.0",
     "vitest": "^1.5.0"
   },
   "peerDependencies": {