API updates, prepare v13.0.0 (google#598)

[googleapis_auth] Add support for non-Google OAuth providers (google#597

)

Prepare to release pkg:googleapis_auth (google#595)

Publish new googleapis_beta (google#592)

Fixes google#591

API updates, prepare v12.0.0 (google#584)

Fix changelog, fix places API (google#560)

Update APIs, prepare for v11.3.0 (google#554)

* chore: small tweak to how JSON API docs are serialized

Follow-up to actually enable latest pkg:http (google#549)

See google#548

Allow latest pkg:http across packages (google#548)

Allow latest pkg:http across packages (google#548)