chore: release 1.20.1 (googleapis#51)

🤖 I have created a release \*beep\* \*boop\* 
---
### [1.20.1](https://www.github.com/googleapis/python-api-core/compare/v1.20.0...v1.20.1) (2020-06-16)


### Bug Fixes

* **dependencies:** increase protobuf version ([googleapis#49](https://www.github.com/googleapis/python-api-core/issues/49)) ([1ba6095](https://www.github.com/googleapis/python-api-core/commit/1ba609592968c9d828449b89a3ade3bcaf5edd7f)), closes [googleapis#48](https://www.github.com/googleapis/python-api-core/issues/48)
---


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

CHANGELOG.md

@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+### [1.20.1](https://www.github.com/googleapis/python-api-core/compare/v1.20.0...v1.20.1) (2020-06-16)
+
+
+### Bug Fixes
+
+* **dependencies:** increase protobuf version ([#49](https://www.github.com/googleapis/python-api-core/issues/49)) ([1ba6095](https://www.github.com/googleapis/python-api-core/commit/1ba609592968c9d828449b89a3ade3bcaf5edd7f)), closes [#48](https://www.github.com/googleapis/python-api-core/issues/48)
+
 ## [1.20.0](https://www.github.com/googleapis/python-api-core/compare/v1.19.1...v1.20.0) (2020-06-09)
 
 

setup.py

@@ -22,7 +22,7 @@
 
 name = "google-api-core"
 description = "Google API client core library"
-version = "1.20.0"
+version = "1.20.1"
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'