Merge pull request get-pytube#35 from hbmartin/martin.playlist-pagina…

…tion

refactor playlist pagination, remove mixins

Merge pull request get-pytube#31 from hbmartin/playlist-addons

Add last_update property to playlist

bump version to 9.5.12

version bump

fix test_playlist.test_title

version bump

escaping for regexes

fixes formatting

add sections to readme

packaging workflow