⬆ Update pytest requirement from ^6.2.4 to ^7.0.1 (#242)

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.2.4...7.0.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
...

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pyproject.toml

@@ -36,7 +36,7 @@ pydantic = "^1.8.2"
 sqlalchemy2-stubs = {version = "*", allow-prereleases = true}
 
 [tool.poetry.dev-dependencies]
-pytest = "^6.2.4"
+pytest = "^7.0.1"
 mypy = "0.930"
 flake8 = "^3.9.2"
 black = {version = "^21.5-beta.1", python = "^3.7"}