Fix "deselect" keyword usage by pytester.assert_outcomes for pytest>6

[elchupanebrej]

This address #466

[codecov]

Codecov Report

Merging #470 (2e51390) into master (ddcbeb5) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #470      +/-   ##
==========================================
+ Coverage   95.40%   95.46%   +0.05%     
==========================================
  Files          48       48              
  Lines        1566     1586      +20     
  Branches      166      174       +8     
==========================================
+ Hits         1494     1514      +20     
  Misses         45       45              
  Partials       27       27              

Impacted Files	Coverage Δ
tests/feature/test_feature_base_dir.py	100.00% <100.00%> (ø)
tests/feature/test_steps.py	100.00% <100.00%> (ø)

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[elchupanebrej]

Let wait until pytest 7.0 release

[The-Compiler]

FWIW I opened a discussion about this on the pytest side too: pytest-dev/pytest#9471

If we decide to stick with the change (likely, I think), having a single assert_outcomes helper function might lead to cleaner code than having if's scattered everywhere.

Also note that pkg_resources is discouraged, I added a comment about it.

[The-Compiler]

Note that pkg_resources is a third-party dependency (part of setuptools, but not the stdlib), and is officially discouraged:

Use of pkg_resources is discouraged in favor of importlib.resources, importlib.metadata, and their backports (resources, metadata). Please consider using those libraries instead of pkg_resources.

Note that importlib.metadata also only was added in Python 3.8. However, pytest 7 added pytest.version_tuple, so you could get the version from there (and assume False when it does not exist).

[elchupanebrej]

pytest_bdd supports pytest<7 and python=3.7, so for now - this is not an option

[elchupanebrej]

Closed because of #466