URL version 2.0.0

Breaking Change

• URL.new/1 now always returns a tuple of the form {:ok, t:URL.t/0} or {:error, {module(), String.t()}}. The previous versions embedded error tuples in the return structure making is too complex to determine if there was a parsing error on the path data. This approach also makes it more straight forward to implement tests that return errors.

Deprecations

• Hard deprecates URL.parse/1

Bug Fixes

• Remove warnings for unused variables when neither ex_phone_number or ex_cldr are configured (these are both optional dependencies). Thanks to @shahryarjb for the report. Closes #5.