without this version of google-services there is a traceback with ionic cordova build android
> Task :app:fabricGenerateResourcesDebug FAILED
ERROR - Crashlytics Developer Tools error.
java.lang.IllegalArgumentException: Crashlytics found an invalid API key: null.
Check the Crashlytics plugin to make sure that the application has been added successfully!
``
see also: https://stackoverflow.com/questions/52614015/invalid-crashlytics-api-key-error-when-upgrading-to-android-gradle-plugin-3-3-0
# TODO
without this version of google-services there is a traceback with
ionic cordova build android