Upgrade dependencies with security releases

[volans-]

GitHub is reporting that 2 of the fixed version dependencies of Netbox have security upgrades and both are marked as high severity by GitHub.

• Paramiko (CVE-2018-1000805)
  Vulnerable versions: >= 2.4.0, < 2.4.2
  Patched version: 2.4.2

• pycryptodome (CVE-2018-15560)
  Vulnerable versions: < 3.6.6
  Patched version: 3.6.6

In both cases the requirements.txt file is forcing the exact version and doesn't allow for an easier upgrade.
Take into consideration also the possibility to relax a bit those requirements to allow for patch version upgrades at least.

[jeremystretch]

Thank you for the heads up!