Rework the ESLint and Jest configurations to use the new ECMAScript m…

…odule format.

eslint.config.ts

@@ -0,0 +1,26 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import jest from 'eslint-plugin-jest';
+
+export default tseslint.config(
+  {
+    ignores: ['dist'],
+  },
+  jest.configs['flat/recommended'],
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': ['warn'],
+      'no-unused-vars': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          caughtErrorsIgnorePattern: '^_',
+        },
+      ],
+    },
+  }
+);

jest.config.ts

@@ -0,0 +1,17 @@
+/**
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+import type {Config} from 'jest';
+
+const config: Config = {
+  clearMocks: true,
+  coverageProvider: 'v8',
+  moduleFileExtensions: ['js', 'ts'],
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  verbose: true,
+};
+
+export default config;

package.json

@@ -29,26 +29,28 @@
     "dist"
   ],
   "devDependencies": {
-    "@types/jest": "^29.5.12",
+    "@eslint/js": "9.14.0",
+    "@types/eslint__js": "^8.42.3",
+    "@types/jest": "^29.5.14",
     "@types/node": "^22.3.0",
-    "@typescript-eslint/eslint-plugin": "^8.1.0",
-    "@typescript-eslint/parser": "^8.1.0",
-    "eslint": "^9.10.0",
-    "eslint-config-prettier": "^9.0.0",
-    "eslint-plugin-jest": "^28.2.0",
+    "eslint": "9.14.0",
+    "eslint-plugin-jest": "^28.9.0",
     "jest": "^29.7.0",
+    "jiti": "^2.4.0",
     "prettier": "^3.0.0",
-    "ts-jest": "^29.2.3",
+    "ts-jest": "^29.2.5",
+    "ts-node": "^10.9.2",
     "typedoc": "^0.26.5",
-    "typescript": "^5.5.4"
+    "typescript": "^5.6.3",
+    "typescript-eslint": "^8.14.0"
   },
   "dependencies": {
     "axios": "1.7.7"
   },
   "scripts": {
     "build": "tsc --project tsconfig.build.json",
     "test:it": "jest --testPathPattern tests/it",
-    "test:lint": "eslint .",
+    "test:lint": "eslint . --flag unstable_ts_config",
     "publish": "yarn build && yarn npm publish"
   }
 }