Existing apps that were built using older Android runtimes but are now rebuilt with 5.0.0 might encounter errors because we were previously passing a parameter to gradle (specifying the Support Library version) which is no longer necessary.
to fix: if you want to continue to use this version in your app, add `project.ext.supportVersion = "26.0.0.-alpha1` to app.gradle.
You can no longer build for iOS with Xcode 8 or below. Time to upgrade!
You can no longer build for iOS with macOS Sierra and below. Definitely time to upgrade!
You need to install Android SDK 28 to build for Android.