chore: fix JavaScript lint errors

[JaySoni1]

Summary

This pull request fixes JavaScript lint errors identified in the automated JavaScript lint workflow.

Files Modified

1. lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js
2. lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js

---

Details of Changes

1. polyfill.js

• Problem: Object was used without being loaded via require().

• Lint Error:
  /home/runner/work/stdlib/stdlib/lib/node_modules/@stdlib/utils/get-prototype-of/lib/polyfill.js
45:22 error Object is used without loading it beforehand via require() stdlib/require-globals

• Fix: Added the required require statement for Object.

Changes Made:

// Add this at the top with other requires
var Object = require( '@stdlib/utils/global-object' );

// Lines 45-46 updated as:
if ( obj instanceof Object ) {
    return Object.prototype;
}

---

2. sync.js

• Problem: JSDoc example incorrectly showed a return example for a scenario that throws an error.

• Lint Error:
  /home/runner/work/stdlib/stdlib/lib/node_modules/@stdlib/_tools/pkgs/deps/lib/sync.js
43:1 error Encountered an error while running code: Cannot find module '/foo/bar/baz'. Did you mean to include a // throws <Error> annotation instead of // returns [{...}]? stdlib/jsdoc-doctest

• Fix: Updated the JSDoc example annotation to correctly indicate an error is thrown.

Changes Made:

/**
* @example
* var pkgs = [ '/foo/bar/baz' ];
* // throws <Error>
* var deps = pkgDeps( pkgs );
*/

---

Checklist ✅

• Read, understood, and followed the contributing guidelines
• Fixed all linting errors mentioned in Fix JavaScript lint errors #6004
• Ran npm test locally and all tests passed successfully
• Ensured there are no breaking changes
• PR addresses both identified lint errors in polyfill.js and sync.js

---

Related Issues

• Fixes: Fix JavaScript lint errors #6004
• Parent Issue: Tracking issue: Resolve JavaScript lint errors #5377

---

Additional Notes

• If there’s any feedback, happy to address it.
• Thank you for reviewing my contribution!

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[kgryte]

As the CI failure does not stem from changes introduced in this PR and tests pass, I'll go ahead and merge.