4.21.5 - Fix a Recorder bug, optimize things, and refresh dependencies

Fix a Recorder bug, optimize things, and refresh dependencies

• Fix a Recorder bug caused by Python PATH whitespace
  --> This resolves #2320
• Improve the error message when Chrome is not installed in UC Mode
• Optimize headless mode output on Windows when possible
• Refresh Python dependencies

What's Changed

• Fix a Recorder bug, optimize things, and refresh dependencies by @mdmintz in #2321

Full Changelog: v4.21.4...v4.21.5