Remediate vulnerabilities

Hello,

I would like to request an update of flask, redis, requests and cryptography pip packages:
https://github.com/pritunl/pritunl/pulls

AWS Inspector marks pritunl as vulnerability package.

The Oracle oci library had been blocking the update for cryptography library but that appears to be fixed. I will try to get the libraries updated and tested in the next release. All of those issues have already been checked, the code in Pritunl is not effected by any of those vulnerabilities.

Ok, thank you for the explanation!