Switch to ESLint flat configs

eslint.config.js

@@ -0,0 +1,15 @@
+// @ts-check
+
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import globals from "globals";
+
+export default tseslint.config(
+    {
+        ...eslint.configs.recommended,
+        languageOptions: {
+            globals: globals.browser
+        }
+    },
+    ...tseslint.configs.recommended,
+);