V0.2.0
- [bug-fix] delay the replacement of image placeholder for 1 cycle 0f87340
- [feature] skip applying empty delta caad799
- [feature] heartbeat on websocket bf7a84b
- [feature] preserve selection when dealing with images 4224fbe
- [feature] pause image placeholder replacement for 1 second 70b9c76
- [feature] image upload error handling ec1882d
- [bug-fix] image handler error 32e641e