Python and typing upgrades

v6.0.0

Prepare release 6.0.0

Model fixes

v5.5.1

Fix playlist tests

Improvements

v5.5.0

Prepare release 5.5.0

Improvements

v5.4.0

Prepare release 5.4.0

Improvements

v5.3.0

Prepare release 5.3.0

Fix

v5.2.1

Prepare release 5.2.1

Improvement

v5.2.0

Prepare release 5.2.0

Fix

v5.1.1

Prepare release 5.1.1

Improvements

v5.1.0

Prepare release 5.1.0

Fix

v5.0.1

Prepare release 5.0.1