use root project settings for compileSdkVersion, buildToolsVersion, etc

[maxmamis]

No description provided.

[maxmamis]

This allows the project to upgrade to a newer android SDK version (as required by React Native 0.5.6)

[ethanneff]

can confirm this works for latest version of React Native (0.56.0)

[MrHubble]

Is there anything stopping this from being merged into a new release?

[franck-nadeau]

I would like to confirm that this fix works. It would be nice for it to be merged in this project.

[annelorraineuy]

This package was updated recently. It would have been great if this PR was included.

[denisw]

The build is broken without this change:

Execution failed for task ':react-native-version-number:lint'.
> Lint found errors in the project; aborting build.

  Fix the issues identified by lint, or add the following to your build script to proceed with errors:
  ...
  android {
      lintOptions {
          abortOnError false
      }
  }
  ...

  Errors found:

  /Users/dwas/Projects/Bosch/pro360.mobile.inventory-app/node_modules/react-native-version-number/android/build.gradle:10: Error: Google Play requires that apps target API level 26 or higher.
   [ExpiredTargetSdkVersion]
          targetSdkVersion 22
          ~~~~~~~~~~~~~~~~~~~