dillon1000/react

Create ReactGenericBatching injection wrapper around BatchedUpdates

This moves calls that don't know if they're in a Fiber or Stack
context to use ReactGenericBatching.batchedUpdates.

The corresponding one will be injected from either the stack
reconciler and/or the fiber reconciler if they're loaded at the
same time.

This lets them share the event system when they're both used
at once.

This can also be useful for libraries that call
unstable_batchedUpdates today but don't know which renderer to
use.