refactor: update imports to use ES module syntax and improve test structure (#1350)

- Changed import statements across multiple files to use the .js extension for ES module compatibility.
- Refactored test files to utilize jest's unstable_mockModule for mocking core actions.
- Removed unnecessary spy instances in tests, replacing them with direct mocked function calls.
- Updated TypeScript configuration to target ES2022 and use NodeNext module resolution.
- Removed the tsconfig.spec.json file and adjusted the main tsconfig.json to exclude test files.

.licenses/npm/ms.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: ms
-version: 2.1.2
+version: 2.1.3
 type: npm
 summary: Tiny millisecond conversion utility
 homepage:
@@ -10,7 +10,7 @@ licenses:
   text: |
     The MIT License (MIT)
 
-    Copyright (c) 2016 Zeit, Inc.
+    Copyright (c) 2020 Vercel, Inc.
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal