This version includes the following non-breaking changes:
C++
Python C-Extension (Default)
Added malloc_trim() calls to Python allocator so RSS will decrease when memory is freed (protocolbuffers/upb@b0f5d5d)
UPB (Python/PHP/Ruby C-Extension)
You can view the release on GitHub.
If you experience any issues with the release, please file a bug or post on the Protocol Buffers forum.