Upgrade Gradle 4.0

The problem is that the Android plugin is doing a check on the Gradle version. But what step 2 means is that you should run with --scan on your current Gradle version to see what deprecated APIs you are using. If for some reason --scan doesn’t work, it also says:

Alternatively, you could run gradle help --warning-mode=all to see the deprecations in the console, though it may not report as much detailed information.