feat(poetry): consider all groups for dev dependencies

[mkniewallner]

Resolves #391.

PR Checklist

• A description of the changes is added to the description of this PR.
• If there is a related issue, make sure it is linked to this PR.
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

Description of changes

Update Poetry dependencies parsing logic to consider dependencies from all groups as development dependencies.

[codecov]

Codecov Report

Merging #392 (c0ef553) into main (133a9cc) will increase coverage by 0.0%.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main    #392   +/-   ##
=====================================
  Coverage   96.1%   96.1%           
=====================================
  Files         38      38           
  Lines       1067    1072    +5     
  Branches     214     215    +1     
=====================================
+ Hits        1026    1031    +5     
  Misses        25      25           
  Partials      16      16           

Impacted Files	Coverage Δ
deptry/dependency_getter/poetry.py	100.0% <100.0%> (ø)