chore: release 1.15.1 (#52)

* updated CHANGELOG.md [ci skip]

* updated setup.cfg [ci skip]

* updated setup.py [ci skip]

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,15 @@
 
 [1]: https://pypi.org/project/google-cloud-spanner/#history
 
+### [1.15.1](https://www.github.com/googleapis/python-spanner/compare/v1.15.0...v1.15.1) (2020-04-08)
+
+
+### Bug Fixes
+
+* add keepalive to gRPC channel ([#49](https://www.github.com/googleapis/python-spanner/issues/49)) ([dfbc656](https://www.github.com/googleapis/python-spanner/commit/dfbc656891c687bc077f811f8490ae92818307f8))
+* increment seqno before execute calls to prevent InvalidArgument … ([#19](https://www.github.com/googleapis/python-spanner/issues/19)) ([adeacee](https://www.github.com/googleapis/python-spanner/commit/adeacee3cc07260fa9fcd496b3187402f02bf157))
+* Pin Sphnix version to last working release ([#51](https://www.github.com/googleapis/python-spanner/issues/51)) ([430ca32](https://www.github.com/googleapis/python-spanner/commit/430ca32fcbedebdfdb00366008a72d8229e4df98))
+
 ## [1.15.0](https://www.github.com/googleapis/python-spanner/compare/v1.14.0...v1.15.0) (2020-03-17)
 
 

setup.py

@@ -22,7 +22,7 @@
 
 name = "google-cloud-spanner"
 description = "Cloud Spanner API client library"
-version = "1.15.0"
+version = "1.15.1"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'