Use mavenCentral() since jcenter is shutting down

I noticed a warning in my React Native project when I build it on Android about this library:
```WARNING: Please remove usages of `jcenter()` Maven repository from your build scripts and migrate your build to other Maven repositories.```
Just want to be helped replace jcenter() from the build script and change to another as jcenter is deprecated and it will be shut down in the future.