⬆️ Upgrade to ESLint 9 (#25)

* ⬆️ Upgrade to ESLint 9

* 🔧 Lint eslint.config.js

eslint.config.js

@@ -0,0 +1,69 @@
+import eslint from "@eslint/js"
+import prettier from "eslint-config-prettier"
+import tseslint from "typescript-eslint"
+
+export default tseslint.config(
+	{
+		languageOptions: {
+			parserOptions: { project: "./tsconfig.eslint.json" },
+		},
+	},
+
+	// eslint-disable-next-line @typescript-eslint/no-unsafe-argument, @typescript-eslint/no-unsafe-member-access
+	eslint.configs.recommended,
+	...tseslint.configs.strictTypeChecked,
+	...tseslint.configs.stylisticTypeChecked,
+	// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+	prettier,
+
+	{
+		rules: {
+			"@typescript-eslint/class-methods-use-this": [
+				"error",
+				{
+					ignoreClassesThatImplementAnInterface: true,
+					ignoreOverrideMethods: true,
+				},
+			],
+			"@typescript-eslint/consistent-type-exports": "error",
+			"@typescript-eslint/consistent-type-imports": [
+				"error",
+				{ fixStyle: "separate-type-imports" },
+			],
+			"@typescript-eslint/default-param-last": "error",
+			"@typescript-eslint/explicit-member-accessibility": [
+				"error",
+				{ accessibility: "no-public" },
+			],
+			"@typescript-eslint/method-signature-style": "error",
+			"@typescript-eslint/no-import-type-side-effects": "error",
+			"@typescript-eslint/no-unnecessary-qualifier": "error",
+			"@typescript-eslint/no-useless-empty-export": "error",
+			"@typescript-eslint/prefer-nullish-coalescing": [
+				"error",
+				{ ignorePrimitives: true },
+			],
+			"@typescript-eslint/prefer-readonly": "error",
+			"@typescript-eslint/prefer-regexp-exec": "error",
+			"@typescript-eslint/promise-function-async": [
+				"error",
+				{ checkArrowFunctions: false },
+			],
+			"@typescript-eslint/require-array-sort-compare": "error",
+			"@typescript-eslint/return-await": "error",
+			"@typescript-eslint/sort-type-constituents": "error",
+			"@typescript-eslint/switch-exhaustiveness-check": "error",
+			"func-style": ["error", "declaration"],
+		},
+	},
+	{
+		ignores: [
+			".pnpm-store/",
+			"dist/",
+			"docs/",
+			"node_modules/",
+			"package-lock.json",
+			"pnpm-lock.yaml",
+		],
+	},
+)

package.json

@@ -24,14 +24,14 @@
 		"test:watch": "vitest --watch"
 	},
 	"devDependencies": {
-		"@typescript-eslint/eslint-plugin": "^7.4.0",
-		"@typescript-eslint/parser": "^7.4.0",
-		"eslint": "^8.57.0",
+		"@eslint/js": "^9.4.0",
+		"eslint": "^9.4.0",
 		"eslint-config-prettier": "^9.1.0",
 		"openai": "^4.29.2",
 		"prettier": "^3.1.0",
 		"typedoc": "^0.25.12",
 		"typescript": "^5.4.3",
+		"typescript-eslint": "^7.12.0",
 		"vite": "^5.2.6",
 		"vitest": "^1.4.0"
 	},