chore: migrate ESLint configuration from .eslintrc to eslint.config.m…

…js and update dependencies

eslint.config.mjs

@@ -0,0 +1,97 @@
+import globals from "globals";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+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 [...compat.extends("eslint:recommended"), {
+    languageOptions: {
+        globals: {
+            ...globals.node,
+            ...globals.browser,
+            describe: true,
+            it: true,
+            before: true,
+            after: true,
+            beforeEach: true,
+        },
+
+        ecmaVersion: 2018,
+        sourceType: "commonjs",
+
+        parserOptions: {
+            ecmaFeatures: {},
+        },
+    },
+
+    rules: {
+        indent: [2, 2, {
+            SwitchCase: 1,
+        }],
+
+        quotes: [2, "single"],
+        "linebreak-style": [2, "unix"],
+        semi: [2, "always"],
+        curly: 2,
+        eqeqeq: 2,
+        "no-eval": 2,
+        "guard-for-in": 2,
+        "no-caller": 2,
+        "no-else-return": 2,
+        "no-eq-null": 2,
+        "no-extend-native": 2,
+        "no-extra-bind": 2,
+        "no-floating-decimal": 2,
+        "no-implied-eval": 2,
+        "no-labels": 2,
+        "no-with": 2,
+        "no-loop-func": 2,
+        "no-native-reassign": 2,
+
+        "no-redeclare": [2, {
+            builtinGlobals: true,
+        }],
+
+        "no-delete-var": 2,
+        "no-shadow-restricted-names": 2,
+        "no-undef-init": 2,
+        "no-use-before-define": 2,
+
+        "no-unused-vars": [2, {
+            args: "none",
+        }],
+
+        "no-undefined": 2,
+        "no-undef": 2,
+        "global-require": 0,
+        "no-console": 2,
+
+        "key-spacing": [2, {
+            beforeColon: false,
+            afterColon: true,
+        }],
+
+        "eol-last": [2, "always"],
+        "no-inner-declarations": [1],
+        "no-case-declarations": [1],
+
+        "no-multiple-empty-lines": [2, {
+            max: 1,
+            maxBOF: 1,
+        }],
+
+        "space-in-parens": [2, "never"],
+
+        "no-multi-spaces": [2, {
+            ignoreEOLComments: true,
+        }],
+    },
+}];

package.json

@@ -37,10 +37,13 @@
     "validatorjs": "^3.22.1"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.17.0",
     "@types/koa__multer": "^2.0.7",
     "@types/node": "^20.12.12",
     "chai": "^4.3.7",
-    "eslint": "^8.35",
+    "eslint": "^9.17.0",
+    "globals": "^15.14.0",
     "mocha": "^10.4.0",
     "nyc": "^15.1.0",
     "typescript": "^5.4.5"