- [x] Merge the one breaking change for api_core. https://github.com/GoogleCloudPlatform/google-cloud-python/pull/4734 https://github.com/GoogleCloudPlatform/google-cloud-python/pull/4947 - [x] Update the version ranges on all packages to set the *upper* bound to `<2.0.0dev`. https://github.com/GoogleCloudPlatform/google-cloud-python/pull/4944 - [x] Release api_core v1.0.0. https://github.com/GoogleCloudPlatform/google-cloud-python/pull/4945 - [x] Update bigquery, datastore, logging, trace, and spanner to require a *lower* bound of `>=1.0.0`. https://github.com/GoogleCloudPlatform/google-cloud-python/pull/4946 - [x] Release the rest of the world. - [x] Deprecate gax https://github.com/googleapis/gax-python/pull/209. - [x] Tag/release gax to update PyPI metadata.