eslint.config.mjs: replaces the legacy config format

Author: ufukty

.eslintrc.json

@@ -0,0 +1,21 @@
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  {
+    files: ["**/*.ts"],
+    extends: [tseslint.configs.recommended],
+    languageOptions: {
+      ecmaVersion: 2025,
+      sourceType: "module",
+    },
+    rules: {
+      "@typescript-eslint/naming-convention": "off",
+      "curly": "off",
+      "eqeqeq": "warn",
+      "semi": "warn",
+    },
+  },
+  {
+    ignores: ["out/**", "dist/**", "**/*.d.ts"],
+  },
+);

eslint.config.mjs

@@ -143,7 +143,8 @@
     "eslint": "^10.0.2",
     "glob": "^13.0.6",
     "mocha": "^11.7.5",
-    "typescript": "^5.9.3"
+    "typescript": "^5.9.3",
+    "typescript-eslint": "^8.56.1"
   },
   "displayName": "dim",
   "engines": {