🚸 Improved Python Typing

[burgholzer]

Description

This PR brings some slight improvements for typing in Python. Since Python 3.8 is required now, literals (PEP 586) can be used for typing without any extra handling. They allow to, e.g., specify which literal strings are permitted as arguments to a parameter that was previously just declared as str. As a result, IDE's can provide better support for available options which should simplify the life of users.

Checklist:

• [x] The pull request only contains commits that are related to it.
• [x] I have added appropriate tests and documentation.
• [x] I have made sure that all CI jobs on GitHub pass.
• [x] The pull request introduces no new warnings and follows the project's style guidelines.

[codecov[bot]]

Codecov Report

Merging #231 (9667151) into main (61627ea) will increase coverage by 0.0%. The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main    #231   +/-   ##
=====================================
  Coverage   96.9%   96.9%           
=====================================
  Files         33      33           
  Lines       1703    1707    +4     
  Branches     210     210           
=====================================
+ Hits        1651    1655    +4     
  Misses        52      52           

Flag	Coverage Δ
cpp	96.9% <ø> (ø)
python	96.9% <100.0%> (+<0.1%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mqt/qcec/parameterized.py	95.5% <100.0%> (+0.1%)	:arrow_up:

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.