v0.3.0

AYT-API 0.3

This update has 2 breaking changes, 12 additions, 5 other changes and 3 documentation updates.

Breaking Changes:

• The equivalent of YoutubeChannel.banner_external_url is now YoutubeChannel.banner_external.url. (6f8ec58#diff-7363042-L1408)
• Removed Python 3.7 support. (7b8f9ed)

All other changes are listed in the changelog

Full Changelog: v0.2.1...v0.3.0