Migrate to ruff

[wRAR]

It turns out that the best way to migrate from old-style type hints syntax is to add from __future__ import annotations, run pyugrade and only then run ruff, as pyugrade AFAIK cannot add from __future__ import annotations and ruff is more hesitant to modify the hints.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.13%. Comparing base (5b202cd) to head (6734709).
Report is 10 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #313      +/-   ##
==========================================
+ Coverage   92.18%   95.13%   +2.95%     
==========================================
  Files           5        5              
  Lines         448      432      -16     
  Branches       78       74       -4     
==========================================
- Hits          413      411       -2     
+ Misses         26       13      -13     
+ Partials        9        8       -1     

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