Update libphonenumber@6.2.1

* Metadata changes:
  - Updated phone metadata for region code(s): BW, LB, MD, PA, PF, VI, ZM
  - New carrier data for country calling code(s): 507 (en), 961 (en)
  - Updated carrier data for country calling code(s): 267 (en), 373 (en)
Merge pull request #2 from seegno/support/libphonenumber-6.2.1

Update libphonenumber@6.2.1