Bump pydantic from 1.6.1 to 1.6.2 in /tests (#83)

Bumps [pydantic](https://github.com/samuelcolvin/pydantic) from 1.6.1 to 1.6.2.
- [Release notes](https://github.com/samuelcolvin/pydantic/releases)
- [Changelog](https://github.com/samuelcolvin/pydantic/blob/master/HISTORY.md)
- [Commits](pydantic/pydantic@v1.6.1...v1.6.2)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/requirements.txt

@@ -5,7 +5,7 @@ isort==5.2.1
 pycodestyle==2.6.0
 pyflakes==2.2.0
 Pygments==2.7.4
-pydantic==1.6.1
+pydantic==1.6.2
 pytest==5.4.3
 pytest-cov==2.10.0
 pytest-mock==3.2.0