Release 0.12.6
Improvements:
- Use leaflet-defaulticon-compatibility for icon image bundling #552
- Fix issue with Phosphor dependency #563
- Fix in the Vector tile layer #568
- Bug fix with respect to the GeoJSON layer #572
- Refactor GeoJSON layer #573
- Add means to save to HTML #574
- Improve docs #575
- Make the xarray dependency optional #561