Update dependency @react-native-community/cli to v2.4.3

Thalia Technicie
2019-07-11T21:44:46+02:00

This MR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [@react-native-community/cli](https://github.com/react-native-community/react-native-cli) | dependencies | minor | [`2.1.1` -> `2.4.3`](htt...

@react-native-community/cli | dependencies | minor | 2.1.1 -> 2.4.3