Handle multiple parsers connected to a step function

[youtux]

Fixes #528

[codecov]

Codecov Report

Merging #530 (533b5cd) into master (81a9264) will increase coverage by 0.06%.
The diff coverage is 94.11%.

@@            Coverage Diff             @@
##           master     #530      +/-   ##
==========================================
+ Coverage   92.62%   92.69%   +0.06%     
==========================================
  Files          48       48              
  Lines        1655     1670      +15     
  Branches      178      179       +1     
==========================================
+ Hits         1533     1548      +15     
  Misses         83       83              
  Partials       39       39              

Impacted Files	Coverage Δ
pytest_bdd/utils.py	89.47% <88.88%> (+2.37%)	⬆️
pytest_bdd/scenario.py	89.65% <93.75%> (+0.12%)	⬆️
pytest_bdd/__init__.py	100.00% <100.00%> (ø)
pytest_bdd/steps.py	94.44% <100.00%> (+0.10%)	⬆️
tests/feature/test_steps.py	100.00% <100.00%> (ø)

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