Implementation Changes
- Fix race condition in recv()'s usage of self.call. (#5935)
- Re-generate the underlying library from protos. (#5953)
- Change 'BatchSettings.max_bytes' default. (#5899)
- Fix race condition where pending Ack IDs can be modified by another thread. (#5929)
Internal / Testing Changes
- Nox: use inplace installs (#5865)