Wrong ProvidePlugin of URL

Describe the bug

The PR #1089 introduced ProvidePlugin for 'URL' from 'url', but URL is not included in node url module.

This causes a browser error of Q is not a constructor if any client code includes new URL(...)

Expected behavior

No error with client code new URL(...)

Current behavior

Error in browser

Possible solution

Remove the fallback settings of 'URL'.

Steps to reproduce

Edit: this is not reproducible any more, since they downgraded this plugin to an older version to workaround the issue.

1. Open https://docs.port.io/
2. Click the search bar at top-right
3. An error reported in browser console.

Screenshots

Context

Your Environment

• Version used: 4.3.5
• Environment name and version (e.g. Chrome 59, node.js 5.4, python 3.7.3):
• Operating System and version (desktop or mobile):
• Link to your project: https://github.com/port-labs/port-docs

Related issue: https://github.com/easyops-cn/docusaurus-search-local/issues/500

Review PR #1089 and the current ProvidePlugin configuration for the URL fallback, including the older plugin version used as a workaround. Verify the behavior with client code using new URL(...) and confirm that the browser error is gone when the incorrect fallback is removed.