use flag config file for eslint

eslint.config.js

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2024, salesforce.com, inc.
+ * All rights reserved.
+ * SPDX-License-Identifier: MIT
+ * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
+ */
+
+import eslint from "@eslint/js";
+import tsEslint from 'typescript-eslint';
+
+export default tsEslint.config(
+    eslint.configs.recommended,
+    ...tsEslint.configs.recommended,
+    ...tsEslint.configs.stylistic,
+
+    {
+        rules: {
+            "strict": ["error", "global"],
+            "@typescript-eslint/no-extra-non-null-assertion": "off"
+        }
+    }
+);

package.json

@@ -63,14 +63,15 @@
         "!**/test/"
     ],
     "devDependencies": {
+        "@eslint/js": "^9.2.0",
+        "@jest/globals": "^29.7.0",
+        "@typescript-eslint/eslint-plugin": "^7.8.0",
         "@typescript-eslint/parser": "^7.8.0",
+        "@typescript-eslint/rule-tester": "^7.8.0",
         "@typescript-eslint/utils": "^7.8.0",
+        "eslint": "^8.57.0",
         "eslint-plugin-eslint-plugin": "^6.1.0",
         "eslint-plugin-node": "^11.1.0",
-        "eslint": "^8.57.0",
-        "@eslint/js": "^9.2.0",
-        "@jest/globals": "^29.7.0",
-        "@typescript-eslint/rule-tester": "^7.8.0",
         "jest": "^29.7.0",
         "jest-chain": "^1.1.6",
         "jest-extended": "^4.0.1",