v1.0.0

This first release is related to this following suggestion.

All major upgrades will be described in the Release section, to help each one to see the evolution of the repository.

So let's do it !

• Use of the Release section. Starting by the 1.0.0 version, because this boilerplate is production ready (and always used at TheCodingMachine for all our mobile projects)
• Upgrade from RN 0.59.9 to RN 0.60.5. See https://facebook.github.io/react-native/blog/2019/07/03/version-60