Mopidy-PlaybackDefaults v0.1.2

• Upgraded to Mopidy 3.0+ and Python 3.7+.

Mopidy-PlaybackDefaults v0.1.1

• Changed branching model to git-flow.
• Changed extension type from http:app to frontend.
• Improved unit tests.

Mopidy-PlaybackDefaults v0.1.0

• Initial release.