chore(deps): update dependency pyarrow to v1 [(#4370)](#4370)

Author: renovate-bot

bigquery_storage/to_dataframe/requirements.txt

@@ -1,7 +1,7 @@
 google-auth==1.19.2
 google-cloud-bigquery-storage==1.0.0
 google-cloud-bigquery==1.25.0
-pyarrow==0.17.1
+pyarrow==1.0.0
 ipython==7.10.2; python_version > '3.0'
 ipython==5.9.0; python_version < '3.0'
 pandas==0.25.3; python_version > '3.0'