Bump urllib3 from 1.26.3 to 1.26.4 (#970)
Bump urllib3 from 1.26.3 to 1.26.4 (#970)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.3 to 1.26.4.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.26.3...1.26.4)
pytube/pytube