Fix dragging piece zindex
Fix moving-square z-index
Merge branch 'master' of github.com:ornicar/chessground

* 'master' of github.com:ornicar/chessground:
  Fix moving-square z-index
  Fix dragging piece zindex
Merge branch 'master' into drag-like-a-boss

* master:
  Fix moving-square z-index
  Fix dragging piece zindex
use translate3d
upgrade react, remove interact
bump 5.0.0 without interact.js