Update fog to v1.20.0 to include Cloud SQL instances
Use fog 1.20.0 CloudIp#destination_id method

Rather than the case statement we can use the cleaner method now part of
fog 1.20+
Adds support to for Cloud SQL service

This adds the `sql` command and allows you to manage `instances`,
`types` and `snapshots`
Allow use of engine/version arguments

This adds the `engine` and `engine-version` arguments when creating a
Cloud SQL instance to select an alternative database engine or version.