Bump pydantic from 1.7.2 to 1.7.4

Bumps [pydantic](https://github.com/samuelcolvin/pydantic) from 1.7.2 to 1.7.4.
- [Release notes](https://github.com/samuelcolvin/pydantic/releases)
- [Changelog](https://github.com/samuelcolvin/pydantic/blob/master/HISTORY.md)
- [Commits](pydantic/pydantic@v1.7.2...v1.7.4)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
...

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Author: dependabot[bot]