Pshtt version

[Ian Lee]

Perhaps this is a Docker-ism that I'm not as familiar with, but is there a reason to pin pshtt to a specific version, rather than leaving the version off and getting the latest from PyPI ? Is this something to optimize the container image building?

domain-scan/Dockerfile

Line 139 in 8a002b5

 RUN pip3 install pshtt==0.2.1 

[Eric Mill]

I removed this in the latest changes to Dockerfile, it no longer versions pshtt.