Upgrade to plugin alpha 6
Upgrade to plugin alpha 6

Summary: Per title

Reviewed By: emilsjolander

Differential Revision: D5410667

fbshipit-source-id: 8f4321282daaf5fdb6b2b32c4cddef229a90772c

facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho,facebook/litho