resolved some warnings

[veenstrajelmer]

Issue addressed

Partly solves #103

Explanation

Updated code based on pytest warnings in reference ci action. Results in new warning overview in ci action linked to this PR (py 3.12)

Checklist

• [x] Updated tests or added new tests
• [x] Branch is up to date with main
• [x] Tests & pre-commit hooks pass
• [x] Updated documentation if needed
• [x] Updated changelog.rst if needed

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud