Fix DNSSEC and Nmap scans

Merge pull request #82 from jonluca/renovate/requests-2.x

Update dependency requests to v2.27.1

Reintroduce SSLyze and scanning

0.9.2

Tighter requirements, brought back sslyze

Updated SSLyze, fixed new Crypto build issues related to outdated dependencies

Upgraded SSLyze to newest version, fixed build issues on Unix related…

… to cryptography

0.8

Correctly implements threading, improve performance ~30%