v7.0.0

What's Changed

• Turn google and google.ads into namespace stub packages by @henribru in #12

This is released as a major version because if you're using Mypy you now need to run it with the --namespace-packages option. This is because the stub packages for google and google.ads have been turned into namespace packages to comply with this update to PEP561: python/peps#2083

Full Changelog: v6.0.1...v7.0.0