Update pytest-runner to 5.3.1

[pyup-bot]

This PR updates pytest-runner from 5.3.0 to 5.3.1.

Changelog

5.3.1

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* Refreshed package metadata.

Links

• PyPI: https://pypi.org/project/pytest-runner
• Changelog: https://pyup.io/changelogs/pytest-runner/
• Repo: https://github.com/pytest-dev/pytest-runner/

[codecov]

Codecov Report

Merging #244 (d2a577d) into master (af5eaf9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #244   +/-   ##
=======================================
  Coverage   52.61%   52.61%           
=======================================
  Files          24       24           
  Lines        1627     1627           
=======================================
  Hits          856      856           
  Misses        771      771           

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