Rollback bigquery/cloud-client.

Author: kurtisvg

bigquery/cloud-client/requirements.txt

@@ -1,6 +1,6 @@
-google-cloud-bigquery[pandas]==1.5.0
+google-cloud-bigquery[pandas]==1.3.0
 google-auth-oauthlib==0.2.0
-ipython==6.5.0; python_version < "3"
-ipython==6.5.0; python_version > "3"
-matplotlib==2.2.3
-pytz==2018.5
+ipython==5.5; python_version < "3"
+ipython; python_version > "3"
+matplotlib
+pytz==2018.3