Changed bahavior upgrading from 0.8.0 to 0.8.1

[tilo]

looks like the API for PhoneLib changed from version 0.8.0 to 0.8.1

before you could do this:

phone = Phonelib.parse(phone_number, ["US", "CA"])

now you have to do this:

phone = nil
phone ||= Phonelib.parse(phone_number, "US")
phone ||= Phonelib.parse(phone_number, "CA")

• such a change in behavior should be caught by failing tests in PhoneLib
  -> there was no test coverage
• any change in behavior should rev-up more than just the last digit of the version
  -> see https://semver.org/