Use explicit cast in plugin.tsx
Use explicit cast in plugin.tsx

Summary:
Marginally safer than ignoring the entire line, which
makes type-checking weaker on subsequent references.

Reviewed By: jknoxville

Differential Revision: D17736479

fbshipit-source-id: 13afcb5f08e53016b7a6cdc7ea135e726586a67b

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper