build(deps): bump cryptography from 3.3.2 to 3.4.7

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.3.2 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@3.3.2...3.4.7)

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

Author: dependabot-preview[bot]

Pipfile

@@ -9,7 +9,7 @@ pytest = "*"
 [packages]
 apns2 = "==0.7.1"
 bugsnag = "==4.1.0"
-cryptography = "==3.3.2"
+cryptography = "==3.4.7"
 gunicorn = "==20.1.0"
 invoke = "==1.5.0"
 peewee = "==3.14.4"