Bump cryptography from 3.3.2 to 39.0.1

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.3.2 to 39.0.1.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@3.3.2...39.0.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements_dev.txt

@@ -6,7 +6,7 @@ flake8==3.4.1
 tox==2.9.1
 coverage==4.4.1
 Sphinx==3.2.1
-cryptography==3.3.2
+cryptography==39.0.1
 PyYAML==5.4.1
 pytest==3.2.3
 pytest-runner==2.12.1