Pin responses to latest version 0.5.1

[pyup-bot]

responses is not pinned to a specific version.

I'm pinning it to the latest version 0.5.1 for now.

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

Changelog

0.5.1

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• Add LICENSE, README and CHANGES to the PyPI distribution (GH-97).

0.5.0

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• Allow passing a JSON body to response.add (GH-82)
• Improve ConnectionError emulation (GH-73)
• Correct assertion in assert_all_requests_are_fired (GH-71)

0.4.0

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• Requests 2.0+ is required
• Mocking now happens on the adapter instead of the session

0.3.0

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• Add the ability to mock errors (Implement detag option in xpathfetchpage (like fetchpage does) #22)
• Add responses.mock context manager (Is speedparser 0.2.0 a hard requirement? #36)
• Support custom adapters (Pin pip to latest version 9.0.1 #33)
• Add support for regexp error matching (Initial Update #25)
• Add support for dynamic bodies via responses.add_callback (Config file for pyup.io #24)
• Preserve argspec when using responses.activate decorator (Convert filter from an operator to a processor #18)

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

Happy merging! 🤖