--enh Adding support for use tag

[bencergazda]

This PR makes possible to render SVG-s containing use tags. Supports both the href and deprecated xlink:href attributes.

[uqmessias]

@matc4, any plans about when it will be merged?

[bencergazda]

@uqmessias Hopefully will get merged in https://github.com/MrDatastorage/react-native-svg-uri-reborn!

[uqmessias]

@bencergazda, I hope you don't mind, but I merged it into a fork of this project in https://github.com/uqmessias/react-native-svg-renderer.

Besides that, we have some improvements there to read SVG and I'm planning to do more in the next weeks or so.

Edit: It's also published on NPM

[sbeca]

I also need the use tag in a new project that I'm working on, so is there a chance that this will be merged @matc4?