Update deps and their structure

[sbs2001]

We are using pretty outdated deps. These should be upgraded, after all we don't want to be "vulnerable" .

Unrelated: have requirement file separate dev dependencies.

[sbs2001]

@rolfschr heads up ! Btw the nix tests are failing at #347 due to update in deps

[Hritik14]

Repaste from #379

The pytest bug is weird. @Hritik14 could you try updating the venv pytest to latest and try running python -m pytest . Just to determine if issue is caused due to system pytest invocation or just some version incompability.

@sbs2001 I think you're right. It is failing because the tests are only compatible with pytest version shipped with the project requirements.
Here is an asciinema reproducing my results:

As you can see, after first installation, which pytest points to the system pytest.
I have pytest 6.2.2 installed and the project requires pytest==5.3.2.
So, it is both due to system pytest invocation and version incompatibility.

Maybe we can look into this here

[prathamaror]

I have a pretty good idea about this should I start working on this I have some questions prior

[Hritik14]

This has been fixed by #379