fix: allow extreme DATE values such as `datetime.date(1, 1, 1)` in `load_gbq`#442

gcf-merge-on-green[bot] merged 3 commits intogoogleapis:maingoogleapis/python-bigquery-pandas:mainfrom

tswast:issue441-load_parquet-DATEtswast/python-bigquery-pandas:issue441-load_parquet-DATECopy head branch name to clipboard