Features

• Model#insertContent() will return a range affected by the insertion. (f4e4644)

  In Model#deleteContent(), added doNotAutoparagraph flag to options.
  Position and LivePosition static creators should handle stickiness param.

• Added possibility to refresh the marker with no changes through Writer#updateMarker() method. Closes #1649. (cf56d90)

• Introduced Schema#setAttributeProperties() and Schema#getAttributeProperties() methods. Closes ckeditor/ckeditor5#1659. (1c6f83a)

• Introduced UpcastConversionApi#getSplitParts(). Also, provided a way to set upcast conversion helper fired for every view element. Closes ckeditor/ckeditor5#1580. Closes ckeditor/ckeditor5#1581. (d0ee3f4)

Bug fixes

• view.DowncastWriter will now correctly wrap and unwrap nested attribute elements. Closes #1716. Closes ckeditor/ckeditor5-font#30. (4126359)
• Attribute and remove change on intersecting ranges done in the same change block will be correctly saved in Differ and downcasted. Closes ckeditor/ckeditor5#1645. (b2a9d86)
• Editor will no longer crash during undo in some pasting+remove scenarios. Closes #1701. (ca619e7)
• Made sure that Schema#getAttributeProperties() always returns an object. Closes #1717. (b3f5da3)
• Markers should be now correctly upcasted inside any element. Closes #1697. (3706324)
• Model#deleteContent() will not throw anymore if the passed selection is in the graveyard root. Closes #1706. (bd875c7)
• The editor will not throw an error when updating an empty fake selection container. Closes #1714. (c48f5a4)