CI: add in codecov.yml file
CI: add in codecov.yml file

googleapis/python-bigquery-pandas,googleapis/python-bigquery-pandas,RTBHOUSE/pandas-gbq,xcompass/pandas-gbq,xcompass/pandas-gbq,RTBHOUSE/pandas-gbq,pydata/pandas-gbq,pydata/pandas-gbq,tactileentertainment/pandas-bigquery,pydata/pydata-google-auth