Updated to work with newer versions of RN

[mrkpatchaa]

Fixes #243
I've done the same described here lugg/react-native-config#248
Steps to test is already defined in #243.

• include issue number that will be resolved by this PR (e.g. Fixes #1234)
• include a summary of the work
• include steps to verify
• update tests (if applicable)
• update readme (if applicable)
• update typescript definitions (if applicable)

[kadikraman]

Hi @rmkpatchaa - sorry I've just merged something that conflicts with your PR - could you change implementation to compile? This causes a warning in newer RN projects (which can be fixed with patch-package), but would break in older ones as discussed here.

[mrkpatchaa]

@kadikraman it's fixed.

[kadikraman]

Thanks for your help! This has been published in v4.1.0.

[mrkpatchaa]

👍 👍 👍
I'll do the update tomorrow ;) 💯