4.41.3 - Passwordless proxy auth

Allow proxy auth without password

• Allow proxy auth with user but no password
  --> This resolves #3947
• Refresh Python dependencies
• Update examples
  --> This resolves #3948
  --> This resolves #3949

What's Changed

• Allow proxy auth with user but no pass by @mdmintz in #3950

Full Changelog: v4.41.2...v4.41.3