* Add Feather icons to react-native-vector-icons
* Bump react-native-vector-icons version number
* Add Feather.d.ts to react-native-vector-icons tsconfig
* Rename Feather.ts to Feather.d.ts in react-native-vector-icons
My environment is typescript 2.4.2, which reminds me of the wrong type.
`[ts] JSX element type 'Icon' does not have any construct or call signatures.` When you add `typeof` changes like this, there is no error