chore(deps): update dependency google-auth to v2 (#150)

Co-authored-by: Dina Graves Portman <[email protected]>

Author: renovate-bot

cloudbuild/snippets/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-build==3.3.2
-google-auth==1.35.0
+google-auth==2.0.1