Optimizations to reduce package dependencies and separate "countries" package

[BodhiHu]

Hi Guys,

This PR will do a few optimizations to reduce package sizes:

• Replace google-libphonenumber(it was too large) with light implementations;
• import only needed functions from lodash

And also separated "countries" resources into a new package, so that it could be reused:

@bodhiveggie/countries

Best Regards, Bodhi