Bump cryptography from 2.5 to 3.3.2

Bumps [cryptography](https://github.com/pyca/cryptography) from 2.5 to 3.3.2.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@2.5...3.3.2)

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

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

setup.py

@@ -36,7 +36,7 @@
         'distro==1.4.0',
         'base58==1.0.0',
         'cffi==1.13.2',
-        'cryptography==2.5',
+        'cryptography==3.3.2',
         'protobuf==3.17.2',
         'prometheus_client==0.7.1',
         'ecdsa==0.13.3',