v2.1.0 - Maintenance Release

This release fixes some bugs and brings the software more up-to-date. I have done some testing against the newly released 10.8.0 server.

Changes:

• Upgrade to MPV version 20220515 9467772.
• Add flag for force_set_played due to double trakt play issue.
• Prevent multiple unwanted update checks.
• Fix to work with python-mpv 1.0 and MPV library v2.
• Add play_cmd and idle_ended_cmd. (#225)
• Allow disabling raise_mpv and also only do it once per play. (#218)
• Make transcode termination failure non-fatal. (#259)