v2.1.0

New Features:

• onDragStart/onDragEnd MosaicWindow props #79
• onRelease Mosaic props #80
• Modern context support #95
• Custom toolbars and drag sources for MosaicWindow #98 & #101 (🎩 @mejackreed)

Bug fixes:

• Remove vulnerable event-stream dependency #99 (🎩 @mejackreed)
• Resize panes in new windows #91
• Render window children properly #65