chore(python): update dependencies in /.kokoro#1126

mukund-ananthu merged 2 commits intomaingoogleapis/python-pubsub:mainfrom

owl-bot-update-lock-a8a80fc6456e433df53fc2a0d72ca0345db0ddefb409f1b75b118dfd1babd952googleapis/python-pubsub:owl-bot-update-lock-a8a80fc6456e433df53fc2a0d72ca0345db0ddefb409f1b75b118dfd1babd952Copy head branch name to clipboard