chore(main): release 1.9.0 (#1623)

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

Author: release-please[bot]

Diff for: CHANGELOG.md

@@ -1,6 +1,13 @@
 # Changelog
 
 
+## [1.9.0](https://github.com/googleapis/gapic-generator-python/compare/v1.8.6...v1.9.0) (2023-03-17)
+
+
+### Features
+
+* Add generator option proto-plus-dep ([#1596](https://github.com/googleapis/gapic-generator-python/issues/1596)) ([1c4de67](https://github.com/googleapis/gapic-generator-python/commit/1c4de6728e02d2fa1aa2c48e1a86def6aef5c563))
+
 ## [1.8.6](https://github.com/googleapis/gapic-generator-python/compare/v1.8.5...v1.8.6) (2023-03-14)
 
 

Diff for: 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 = "1.8.6"
+version = "1.9.0"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "click >= 6.7",