Enable RN projects to define the Android AppCompat Library version (and fix dependency issues with RN 0.59 RC)

[christoph-jerolimov]

Does any other open PR do the same thing?

No

What issue is this PR fixing?

Issue #2695, a problem with the upcoming version of react-native. This should also work with all previous versions of RN.

How did you test this PR?

• Use a RN 0.58.x project with react-native-maps which works fine.
• Update RN to 0.59.0-rc.2. This new version has some other gradle depencies and use Android 28 as build tool. Some other changes are also required, a complete diff is available here.
• The build breaks with only updating RN.
• The build works again with applying this change. (My project uses supportLibVersion = "28.0.0")

Test this PR before it got merged

You can test it with your project by installing this branch directly from GitHub:

npm install --save "react-native-maps@jerolimov/react-native-maps#fix-rn59rc-compile-issues"

or

yarn add "react-native-maps@jerolimov/react-native-maps#fix-rn59rc-compile-issues"

Remember to switch back to the official releases as soon as possible. 😏

[rborn]

LGTM
@alvelig 🐽

[alvelig]

LGTM