chore: release 2.4.2 (#210)

🤖 I have created a release \*beep\* \*boop\*
---
### [2.4.2](https://www.github.com/googleapis/python-vision/compare/v2.4.1...v2.4.2) (2021-07-29)


### Bug Fixes

* enable self signed jwt for grpc ([#207](https://www.github.com/googleapis/python-vision/issues/207)) ([f5b5ca5](https://www.github.com/googleapis/python-vision/commit/f5b5ca52aaa04dbe91dcf32097309e00593b5ce9))


### Documentation

* add Samples section to CONTRIBUTING.rst ([#201](https://www.github.com/googleapis/python-vision/issues/201)) ([f6eaa1c](https://www.github.com/googleapis/python-vision/commit/f6eaa1c0a89258f9378672b8713990fc10cea0c9))


### Miscellaneous Chores

* release as 2.4.2 ([#209](https://www.github.com/googleapis/python-vision/issues/209)) ([8d48b1b](https://www.github.com/googleapis/python-vision/commit/8d48b1b2284da8eff95190478292f5422d59a2f1))
---


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

CHANGELOG.md

@@ -4,6 +4,23 @@
 
 [1]: https://pypi.org/project/google-cloud-vision/#history
 
+### [2.4.2](https://www.github.com/googleapis/python-vision/compare/v2.4.1...v2.4.2) (2021-07-29)
+
+
+### Bug Fixes
+
+* enable self signed jwt for grpc ([#207](https://www.github.com/googleapis/python-vision/issues/207)) ([f5b5ca5](https://www.github.com/googleapis/python-vision/commit/f5b5ca52aaa04dbe91dcf32097309e00593b5ce9))
+
+
+### Documentation
+
+* add Samples section to CONTRIBUTING.rst ([#201](https://www.github.com/googleapis/python-vision/issues/201)) ([f6eaa1c](https://www.github.com/googleapis/python-vision/commit/f6eaa1c0a89258f9378672b8713990fc10cea0c9))
+
+
+### Miscellaneous Chores
+
+* release as 2.4.2 ([#209](https://www.github.com/googleapis/python-vision/issues/209)) ([8d48b1b](https://www.github.com/googleapis/python-vision/commit/8d48b1b2284da8eff95190478292f5422d59a2f1))
+
 ### [2.4.1](https://www.github.com/googleapis/python-vision/compare/v2.4.0...v2.4.1) (2021-07-21)
 
 

setup.py

@@ -19,7 +19,7 @@
 
 name = "google-cloud-vision"
 description = "Cloud Vision API API client library"
-version = "2.4.1"
+version = "2.4.2"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     # NOTE: Maintainers, please do not require google-api-core>=2.x.x