Summary:
In line with, https://github.com/facebook/flipper/pull/874/files, the package should promote itself as iOS 9.0 compatibe, to prevent errors and warnings like:
```
mweststrate-mbp:ios mweststrate$ pod install
Detected React Native module pod for react-native-flipper
Analyzing dependencies
Fetching podspec for `DoubleConversion` from `../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec`
Fetching podspec for `Folly` from `../node_modules/react-native/third-party-podspecs/Folly.podspec`
Fetching podspec for `glog` from `../node_modules/react-native/third-party-podspecs/glog.podspec`
[!] CocoaPods could not find compatible versions for pod "react-native-flipper":
In Podfile:
react-native-flipper (from `../node_modules/react-native-flipper`)
Specs satisfying the `react-native-flipper (from `../node_modules/react-native-flipper`)` dependency were found, but they required a higher minimum deployment target.
```
```
mweststrate-mbp:ios mweststrate$ pod install
Detected React Native module pod for react-native-flipper
Analyzing dependencies
Downloading dependencies
Installing react-native-flipper 0.33.1
Generating Pods project
Integrating client project
Pod installation complete! There are 34 dependencies from the Podfile and 38 total pods installed.
[!] The platform of the target `ReactNativeFlipperExample` (iOS 9.0) may not be compatible with `react-native-flipper (0.33.1)` which has a minimum requirement of iOS 10.0.
[!] The platform of the target `ReactNativeFlipperExampleTests` (iOS 9.0) may not be compatible with `react-native-flipper (0.33.1)` which has a minimum requirement of iOS 10.0.
mweststrate-mbp:ios mweststrate$ cd ..
mweststrate-mbp:ReactNativeFlipperExample
```
Reviewed By: passy
Differential Revision: D20362156
fbshipit-source-id: 766d033f2ea2e5559a72a3473115bc4a470a284f
2de3c69950