Bump cryptography from 2.4.2 to 3.2 in /service_status

Bumps [cryptography](https://github.com/pyca/cryptography) from 2.4.2 to 3.2.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst)
- [Commits](pyca/cryptography@2.4.2...3.2)

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

service_status/requirements.txt

@@ -1,6 +1,6 @@
 alembic==1.4.3
 ipfsapi==0.4.4
-cryptography==3.1.1
+cryptography==3.2
 rlp==1.2.0
 web3==5.10.0
 boto3==1.15.9