Add dylib to mopro integration

[0xturboblitz]

Right now, mopro builds a .a library instead of .dylib, see here.
It looks like that the reason why the iOS app works when running it on Xcode but not with the react-native server or when exporting a .ipa.
Adapting mopro to use .dylib would allow us to do iOS releases.
Relevant PRs in mopro are here and here
Due to the way mopro is integrated now (subdirs copied in /app/ios), this would involved modifying the scripts/build_ios_module.sh script.

[0xturboblitz]

Solved in #82 by leaving mopro on iOS