fix: Cherrypick protobuf fix for freeze exception

Author: vchudnov-g

CHANGELOG.md

@@ -4,6 +4,12 @@
 
 [1]: https://pypi.org/project/google-cloud-spanner/#history
 
+## [3.22.2](https://github.com/googleapis/python-spanner/compare/v3.22.1...v3.22.2) (2022-10-07)
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#839](https://github.com/googleapis/python-spanner/issues/839)) ([06725fc](https://github.com/googleapis/python-spanner/commit/06725fcf7fb216ad0cffb2cb568f8da38243c32e))
+
 ## [3.22.1](https://github.com/googleapis/python-spanner/compare/v3.22.0...v3.22.1) (2022-10-04)
 
 

setup.py

@@ -22,7 +22,7 @@
 
 name = "google-cloud-spanner"
 description = "Cloud Spanner API client library"
-version = "3.22.1"
+version = "3.22.2"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'