Update dependency react-native-share to v1.2.0

Thalia Technicie
2019-05-30T11:16:31+02:00

This MR contains the following updates: | Package | Type | Update | Change | References | |---|---|---|---|---| | react-native-share | dependencies | minor | [`1.1.3` -> `1.2.0`](https://diff.intrinsic.com/react-native-share/1.1.3/1.2.0...

react-native-share | dependencies | minor | 1.1.3 -> 1.2.0 | source