Python 2.7/3.4 Support about pytest-socket

[miketheman]

Today I learned of this nice visual representation of the lifecycle: https://python-release-cycle.glitch.me/
So I think it's safe to consider that support for 2.7 and 3.4 can be removed any time now.

[atugushev]

The 3.4 has been dropped by many projects since April. The 2.7 better to drop after 01.01.2020.

[miketheman]

Today I noticed that Python 3.4 no longer works with pip version 20.x and fails the Appveyor build.

Things I'm going to consider:

• Migrate from TravisCI & AppVeyor to GitHub Actions for Linux, Windows, and add Mac
• Drop support for Python 2.7, 3.4 (3.4 hit EOL over a year ago)
• Remove tox from the equation and use the base pytest command
• Add test support for Python 3.8, maybe 3.9, maybe pypy (See #20 )
• Convert project to use poetry for build/release tooling - no impact to end users

After a few of these things are done, I'll close out this issue, and get back to triage/testing the rest of the open issues.