Bump pandas-gbq from 0.10.0 to 0.12.0
Bump pandas-gbq from 0.10.0 to 0.12.0

Bumps [pandas-gbq](https://github.com/pydata/pandas-gbq) from 0.10.0 to 0.12.0.
- [Release notes](https://github.com/pydata/pandas-gbq/releases)
- [Changelog](https://github.com/pydata/pandas-gbq/blob/master/release-procedure.md)
- [Commits](https://github.com/pydata/pandas-gbq/compare/0.10.0...0.12.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ebmdatalab/openprescribing,ebmdatalab/openprescribing,annapowellsmith/openpresc,annapowellsmith/openpresc,annapowellsmith/openpresc,ebmdatalab/openprescribing,annapowellsmith/openpresc,ebmdatalab/openprescribing