Upgrade ESLint.

eslint.config.mjs

@@ -0,0 +1,42 @@
+import typescriptEslint from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+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 [
+    {
+        ignores: ['node_modules/**'],
+    },
+    ...compat.extends(
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended-type-checked",
+    "plugin:@typescript-eslint/stylistic-type-checked",
+), {
+    plugins: {
+        "@typescript-eslint": typescriptEslint,
+    },
+    files: ['**/*.ts', '**/*.tsx'],
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 5,
+        sourceType: "script",
+
+        parserOptions: {
+            project: true,
+        },
+    },
+
+    rules: {
+        "@typescript-eslint/no-explicit-any": "off",
+    },
+}];