Update pytest-aiohttp to 0.1.3

[pyup-bot]

There's a new version of pytest-aiohttp available.
You are currently using 0.1.2. I have updated it to 0.1.3

These links might come in handy: PyPI | Changelog | Repo

Changelog

0.1.3

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• Add MANIFEST.in file

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[coveralls]

Coverage remained the same at 81.553% when pulling b27c9f7 on pyup-update-pytest-aiohttp-0.1.2-to-0.1.3 into c47939c on develop.