Bump cryptography from 3.4.6 to 3.4.7 (#11)

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.4.6 to 3.4.7.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@3.4.6...3.4.7)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-cryptography==3.4.6
+cryptography==3.4.7
 iso3166==1.0.1
 packaging==20.9
 requests==2.25.1