fix: address review feedback

- Remove core-js@3.1.4 (rebase artifact from PR #946)
- Fix JS config to use extends pattern instead of redundant spread

Co-Authored-By: Claude <noreply@anthropic.com>

Author: kdaviduik

eslint.config.mjs

@@ -21,14 +21,13 @@ export default tseslint.config(
 
   {
     files: ['src/**/*.js'],
-    ...eslint.configs.recommended,
+    extends: [eslint.configs.recommended],
     languageOptions: {
       globals: {
         ...globals.browser,
       },
     },
     rules: {
-      ...eslint.configs.recommended.rules,
       'no-unused-vars': ['error', { caughtErrorsIgnorePattern: '^_' }],
     },
   },

package.json

@@ -68,7 +68,6 @@
     "aws-sdk": "2.6.8",
     "babelify": "10.0.0",
     "chai": "4.2.0",
-    "core-js": "3.1.4",
     "eslint": "^9.39.4",
     "fetch-pretender": "1.5.0",
     "global-npm": "0.3.0",