Update compileSdkVersion version (#3516)
Update compileSdkVersion version (#3516)

when compileSdkVersion is 25, below error was occured in react native 0.56.0.
"No resource found that matches the given name: attr 'android:keyboardNavigationCluster'"
so i have to change compileSdkVersion to 26.
Please add this push on your repository.
Thanks
3sidedcube/react-native-navigation,wix/react-native-navigation,chicojasl/react-native-navigation,Jpoliachik/react-native-navigation,ceyhuno/react-native-navigation,wix/react-native-navigation,guyca/react-native-navigation,ceyhuno/react-native-navigation,thanhzusu/react-native-navigation,Jpoliachik/react-native-navigation,Jpoliachik/react-native-navigation,ceyhuno/react-native-navigation,ceyhuno/react-native-navigation,chicojasl/react-native-navigation,chicojasl/react-native-navigation,chicojasl/react-native-navigation,wix/react-native-navigation,3sidedcube/react-native-navigation,chicojasl/react-native-navigation,wix/react-native-navigation,thanhzusu/react-native-navigation,wix/react-native-navigation,thanhzusu/react-native-navigation,chicojasl/react-native-navigation,guyca/react-native-navigation,thanhzusu/react-native-navigation,ceyhuno/react-native-navigation,Jpoliachik/react-native-navigation,3sidedcube/react-native-navigation,thanhzusu/react-native-navigation,guyca/react-native-navigation,3sidedcube/react-native-navigation,thanhzusu/react-native-navigation,Jpoliachik/react-native-navigation,wix/react-native-navigation,ceyhuno/react-native-navigation,guyca/react-native-navigation,Jpoliachik/react-native-navigation