Fixed gradle configuration 'compile' deprecation

[Rapsssito]

Fixed gradle compile deprecation warning as in tradle/react-native-udp#88 (comment).

Intent

This fixes a breaking API change with the Android Gradle plugin, which was deprecated as of version 3.0.0 and later made obsolete.

Changes

When adding Gradle dependencies, the compile command has been removed and replaced with implementation/api.

More information

* Gradle support docs: https://docs.gradle.org/5.4.1/userguide/java_library_plugin.html#sec:java_library_separation

* Android deprecation doc: https://developer.android.com/studio/build/dependencies?utm_source=android-studio#dependency_configurations

[Rapsssito]

@aprock or @phillbaker
Hope you can merge this

[phillbaker]

Dupe of #3.

I'm not sure that this change is necessary as the typical outputs in Android studio are only deprecation warnings, not errors. This change is usually a suggestion, not a requirement. I believe that changing this would also break backward compatibility with other versions of gradle.

[Rapsssito]

I'll leave the PR open until it breaks Gradle compatibility. This is a fix for anyone getting this warning:

Configure project :react-native-tcp
WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html