chore(deps): update dependency google-api-python-client to v1.12.8 (#54)

Author: renovate-bot

language/snippets/api/requirements.txt

@@ -1,3 +1,3 @@
-google-api-python-client==1.12.5
+google-api-python-client==1.12.8
 google-auth==1.23.0
 google-auth-httplib2==0.0.4