Bump pydantic from 1.7.3 to 1.8.1
Bump pydantic from 1.7.3 to 1.8.1

Bumps [pydantic](https://github.com/samuelcolvin/pydantic) from 1.7.3 to 1.8.1.
- [Release notes](https://github.com/samuelcolvin/pydantic/releases)
- [Changelog](https://github.com/samuelcolvin/pydantic/blob/master/HISTORY.md)
- [Commits](https://github.com/samuelcolvin/pydantic/compare/v1.7.3...v1.8.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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