Bump certifi from 2020.12.05 to 2021.5.30

Bumps [certifi](https://github.com/certifi/python-certifi) from 2020.12.05 to 2021.5.30.
- [Release notes](https://github.com/certifi/python-certifi/releases)
- [Commits](https://github.com/certifi/python-certifi/compare/2020.12.05...2021.05.30

)

---
updated-dependencies:
- dependency-name: certifi
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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