Phone metadata refresh (v8.12.21 Apr 8 2021)

[shanipribadi]

Hello,

There had been a new release of libphonenumber https://github.com/google/libphonenumber/releases/tag/v8.12.21
which is mainly a metadata refresh.

Could we have a new release please?

p.s. do mention if you would like a PR for the metadata refresh,

Regards

[daddyz]

@shanipribadi released right now