chore: release 1.19.1 (#144)

🤖 I have created a release \*beep\* \*boop\* 
---
### [1.19.1](https://www.github.com/googleapis/python-spanner/compare/v1.19.0...v1.19.1) (2020-10-13)


### Bug Fixes

* handle Unmergable errors when merging struct responses ([#152](https://www.github.com/googleapis/python-spanner/issues/152)) ([d132409](https://www.github.com/googleapis/python-spanner/commit/d132409dd4300cb2dca7c4bc7dbdd4d429d2fa7c))


### Documentation

* update samples dep to 'google-cloud-spanner==1.19.0' ([#137](https://www.github.com/googleapis/python-spanner/issues/137)) ([0fba41a](https://www.github.com/googleapis/python-spanner/commit/0fba41a5c19b02b0424705618dd1e2e5ca12238f))
* update samples from python-docs-samples ([#146](https://www.github.com/googleapis/python-spanner/issues/146)) ([7549383](https://www.github.com/googleapis/python-spanner/commit/754938386c96814a3546d30d38d874734d1c201c))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please).

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,19 @@
 
 [1]: https://pypi.org/project/google-cloud-spanner/#history
 
+### [1.19.1](https://www.github.com/googleapis/python-spanner/compare/v1.19.0...v1.19.1) (2020-10-13)
+
+
+### Bug Fixes
+
+* handle Unmergable errors when merging struct responses ([#152](https://www.github.com/googleapis/python-spanner/issues/152)) ([d132409](https://www.github.com/googleapis/python-spanner/commit/d132409dd4300cb2dca7c4bc7dbdd4d429d2fa7c))
+
+
+### Documentation
+
+* update samples dep to 'google-cloud-spanner==1.19.0' ([#137](https://www.github.com/googleapis/python-spanner/issues/137)) ([0fba41a](https://www.github.com/googleapis/python-spanner/commit/0fba41a5c19b02b0424705618dd1e2e5ca12238f))
+* update samples from python-docs-samples ([#146](https://www.github.com/googleapis/python-spanner/issues/146)) ([7549383](https://www.github.com/googleapis/python-spanner/commit/754938386c96814a3546d30d38d874734d1c201c))
+
 ## [1.19.0](https://www.github.com/googleapis/python-spanner/compare/v1.18.0...v1.19.0) (2020-09-08)
 
 

setup.py

@@ -22,7 +22,7 @@
 
 name = "google-cloud-spanner"
 description = "Cloud Spanner API client library"
-version = "1.19.0"
+version = "1.19.1"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'