Enable eslint for util.ts (#3887)

* Enable eslint for util.ts

* Drop babel (since eslint parser was replaced by typescript-parser and it doesn't seem to be used anywhere)

* Apply "plugin:@typescript-eslint/recommended"

* Minor

* Remove comment for generated file (Keep the first comment only)

.eslintrc.js

@@ -19,12 +19,13 @@ module.exports = {
     ],
     parser: "vue-eslint-parser",
     parserOptions: {
-        parser: "@babel/eslint-parser",
+        parser: "@typescript-eslint/parser",
         sourceType: "module",
         requireConfigFile: false,
     },
     plugins: [
-        "jsdoc"
+        "jsdoc",
+        "@typescript-eslint",
     ],
     rules: {
         "yoda": "error",
@@ -163,6 +164,21 @@ module.exports = {
                 context: true,
                 jestPuppeteer: true,
             },
+        },
+
+        // Override for TypeScript
+        {
+            "files": [
+                "**/*.ts",
+            ],
+            extends: [
+                "plugin:@typescript-eslint/recommended",
+            ],
+            "rules": {
+                "jsdoc/require-returns-type": "off",
+                "jsdoc/require-param-type": "off",
+                "@typescript-eslint/no-explicit-any": "off",
+            }
         }
     ]
 };