chore(main): release 1.4.0 (#1435)

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

Author: release-please[bot]

packages/gapic-generator/CHANGELOG.md

@@ -1,6 +1,13 @@
 # Changelog
 
 
+## [1.4.0](https://github.com/googleapis/gapic-generator-python/compare/v1.3.1...v1.4.0) (2022-09-07)
+
+
+### Features
+
+* Implement REST support for MixIns ([#1378](https://github.com/googleapis/gapic-generator-python/issues/1378)) ([0e38fa8](https://github.com/googleapis/gapic-generator-python/commit/0e38fa839460401453b510b616f1e22bcdead60d))
+
 ## [1.3.1](https://github.com/googleapis/gapic-generator-python/compare/v1.3.0...v1.3.1) (2022-09-07)
 
 

packages/gapic-generator/setup.py

@@ -22,7 +22,7 @@
 name = "gapic-generator"
 description = "Google API Client Generator for Python"
 url = "https://github.com/googleapis/gapic-generator-python"
-version = "1.3.1"
+version = "1.4.0"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "click >= 6.7",