Upgrade bindings to work with 0.4.1 (which also supports iOS)

[alltonp]

The problem

There is a newer version of react-native-checkbox (0.4.x) that also supports iOS

Considered solution

I've forked the repo to get it to work with 0.4.1, which works okay for now, but would be nice if the official bindings worked with it

see: https://github.com/alltonp/checkbox

Thanks,
Paul

[MoOx]

I followed my notifications from the bottom & missed this before REDOING the work you did 😭
Anyway should be good, except for the lineWidth thing I would like you to adjust (credit is due)