This updates our libPhoneNumber dependency. See [the libPhoneNumber-iOS
commit][0].
According to [the upstream libphonenumber release notes][1], they
updated the formatting for +49 numbers. That caused a test to break, so
I updated it (and tested a few additional dialing codes).
[0]: 8b6f552682
[1]: 90503ecef3/release_notes.txt (L21)