Update coverage to 4.5.3 (#1675)
Update coverage to 4.5.3 (#1675)

This PR updates [coverage](https://pypi.org/project/coverage) from **4.5.2** to **4.5.3**.



*The bot wasn't able to find a changelog for this release. [Got an idea?](https://github.com/pyupio/changelogs/issues/new)*

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/coverage
  - Changelog: https://pyup.io/changelogs/coverage/
  - Repo: https://github.com/nedbat/coveragepy
</details>


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