Update mypy action

[CagtayFabry]

Changes

Update mypy GitHub action:

• install mypy via conda
• add local weldx install

see #845

Checks

• [x] updated tests

[CagtayFabry]

Is this what you had in mind with #845 @marscher ?

The local pip install doesn't seem to make a difference here

[github-actions[bot]]

Test Results

2 187 tests  ±0   2 186 :heavy_check_mark: ±0   2m 41s :stopwatch: +11s        1 suites ±0          1 :zzz: ±0         1 files   ±0          0 :x: ±0 

Results for commit 863015bb. ± Comparison against base commit ac3eda4a.

:recycle: This comment has been updated with latest results.

[codecov[bot]]

Codecov Report

Merging #847 (863015b) into master (ac3eda4) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #847   +/-   ##
=======================================
  Coverage   96.60%   96.60%           
=======================================
  Files          95       95           
  Lines        6222     6222           
=======================================
  Hits         6011     6011           
  Misses        211      211           

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[marscher]

Is this what you had in mind with #845 @marscher ?

yes, it is. It is kinda strange, that with the same mypy version, configuration, and stub packages I get very different results.