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

Author: renovate-bot

bigquery/pandas-gbq-migration/requirements.txt

@@ -3,5 +3,5 @@ google-cloud-bigquery-storage==1.0.0
 pandas==0.25.3; python_version > '3.0'
 pandas==0.24.2; python_version < '3.0'
 pandas-gbq==0.13.2
-pyarrow==0.17.1
+pyarrow==1.0.0
 grpcio==1.30.0

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'