Update flake8-docstrings to 1.5.0

[pyup-bot]

This PR updates flake8-docstrings from 1.3.0 to 1.5.0.

The bot wasn't able to find a changelog for this release. Got an idea?

Links

• PyPI: https://pypi.org/project/flake8-docstrings
• Repo: https://gitlab.com/pycqa/flake8-docstrings

[codecov]

Codecov Report

Merging #151 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #151      +/-   ##
==========================================
- Coverage   81.87%   81.81%   -0.06%     
==========================================
  Files          45       45              
  Lines        1848     1848              
==========================================
- Hits         1513     1512       -1     
- Misses        335      336       +1

Impacted Files	Coverage Δ
honeycomb/servicemanager/base_service.py	58.91% <0%> (-0.78%)	⬇️

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