Release 2.12.1

• This is a re-release of 2.12.0 (that was marked as bad). Please use this instead.

Major Features and Improvements

• No major features or improvements.

Breaking Changes

• Users of remote_predict_py should stay on v2.11 and avoid v2.12.

Bug Fixes and Other Changes

• Update TF Serving pip package protobuf requirements to match TF's. (commit: 2402877)
• Update version for 2.12.1 release. (#2139) (commit: bd203fa)