Updating precommit and gitignore

[nitsujri]

• .precommit... updated to match Github's CI.
  • Currently they are in direct conflict where precommit will auto-change such that ci's linter fails.
• Added .gitignore pytest, poetry, .vscode
• Removed references to travis ci

Not sure if this repo is open to using pytest instead of unittest as the test runner, but in VSCode pytest is the defacto way to run specs from within the environment.

Ignoring poetry unless we're interested in switching from pip.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0a677fe) 92.43% compared to head (e5c1b2b) 92.43%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #84 +/- ## ======================================= Coverage 92.43% 92.43% ======================================= Files 57 57 Lines 3502 3502 Branches 223 223 ======================================= Hits 3237 3237 Misses 223 223 Partials 42 42 ```

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[PetrDlouhy]

Seems reasonable.

I don't know what changes would introducing pytest need, but if it is only the pytest.ini and other developers would benefit from it I would not be against including it in the repo.