Feature Request(Expand animation)

Hi,
@AllenFang thanks for your awesome works for release v3. It's really fantastic and exactly what's react community needs for table component.
I think you can get some idea from this grid too:
http://demos.krajee.com/grid-demo
Maybe it's useful for next version.
For example `Expand` feature animation can be useful.
Or `Custom Filter` styles or maybe a complex example can be useful too , ...