- Update to v4.0.1
* Fix version parsing #739 (@fcollonval)
- Release v4.0.0
## Enhancements made
* Change header for unchanged notebook meta #736 (@vidartf)
* Ensure collapsed mergepane border #731 (@vidartf)
* Add translation for the frontend in Lab #709 (@fcollonval)
* Make collapseIdentical margin configurable #707 (@fcollonval)
* Support hiding base editor #705 (@fcollonval)
* Restore collapsers #701 (@fcollonval)
* Add support for using cell ID in diffing and merging #639
(@vidartf)
## Bugs fixed
* Fix duplicate pickers #735 (@vidartf)
* CM6: Fix spacing between editors #728 (@HaudinFlorence)
* Fix drag and drop #723 (@fcollonval)
* Do not collapse editor lines in single editor #719
(@fcollonval)
* Improve alignment #717 (@fcollonval)
* Add CSS files in nbdime package #715 (@fcollonval)
* Apply post-mortem review comments #711 (@fcollonval)
* Improve findAlignedLines #706 (@fcollonval)
* Improve diff view #696 (@fcollonval)
* Fix wrong picker marker (a typo during lab 4.0 migration) #688
(@krassowski)
* Use pseudo-elements instead of border to preserve line height
#687 (@krassowski)
- Don't test on python39: No python39-notebook anymore