Updated build.gradle for Gradle 7

[YanouHD]

Change 'maven' plugin to 'maven-publish', and changed installArchives task to be compatible with maven-publish. This will enable the package to work with Gradle 7

[shairoemi]

Hello! Any plan to merge this? will be really useful as new react-native versions come with Gradle 7

Also, while this isn't merged, is this package incompatible with Gradle 7? is there a workaround?

[perry-mitchell]

I'd be interested in a workaround or fork too, as this blocks my upgrade as well.

EDIT: Ended up dropping this package for the supported react-native-encrypted-storage. It's a pity because this package had helpers built into the native portion of the library, and that's going to be hard to replace.