chore(deps): update dependency google-auth to v1.22.0 (#94)

Author: renovate-bot

dataproc/snippets/requirements.txt

@@ -1,5 +1,5 @@
 grpcio==1.32.0
-google-auth==1.21.3
+google-auth==1.22.0
 google-auth-httplib2==0.0.4
 google-cloud==0.34.0
 google-cloud-storage==1.30.0