Summary:
- PickerIOS accepts now a new prop: style
- this prop modifies the native style of the RCTPicker allowing to modify the font size of the items (fontSize), color of the items (color, only 6 char HEX values for now) and alignment of the items (textAlign)
Closes https://github.com/facebook/react-native/pull/4490
Reviewed By: svcscm
Differential Revision: D2723190
Pulled By: nicklockwood
fb-gh-sync-id: ab9188192f1d0d087787dfed8c128073bfaa3235
e2c35dddba