Update TravisCI NodeJS to v6
Update TravisCI NodeJS to v6

NativeForms/framework-src,psychobolt/react-native-boilerplate,NativeForms/framework-src,NativeForms/framework-src,psychobolt/react-native-boilerplate,NativeForms/framework-src,psychobolt/react-native-boilerplate,psychobolt/react-native-boilerplate