v2.1.3 - type fixes

Some typescript fixes courtesy of @doublethefish - thank you!

• chore(example): allow test runs without react-native global install a1e2836
• chore: Adds rn's testID to the valid props, avoiding common type warnings 6cebbfe
• chore: Exports enums for build-time typescript static analysis e4ec82a

v2.1.2...v2.1.3