Fix for amplitude_bell size offset

[arrrrrmin]

As promised in #49 here is the fix for the amplitude_bell size offset (fixes #49).
I’m not very familiar with unittest TestCase-Classes, @CodeLionX could you please review the tests/test_generator/test_lengths.py?
There might be a more efficient way to check for the valid generation of anomalies under different length values?

Greetings and thanks for the very fast reply.

[SebastianSchmidl]

Thank you very much for the prompt fix (+ test cases). I like the test but have some suggestions for improvements.

👍🏼

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.00%. Comparing base (b2b18ca) to head (3697c3c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   89.99%   90.00%   +0.01%     
==========================================
  Files          53       53              
  Lines        2088     2091       +3     
==========================================
+ Hits         1879     1882       +3     
  Misses        209      209              

Flag	Coverage Δ
unittests	90.00% <100.00%> (+0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[SebastianSchmidl]

Mypy still fails on the test-file. You can add # type: ignore to the corresponding lines because specifying the full correct type of the config object is too verbose.