Update responses to 0.7.0

[pyup-bot]

There's a new version of responses available.
You are currently using 0.6.1. I have updated it to 0.7.0

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

Changelog

0.7.0

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• Responses will now be rotated until the final match is hit, and
  then persist using that response (Add legacy /daytime #171).

0.6.2

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• Fixed call counting with exceptions (Error occurs rendering project page when a maintainer doesn't have an email #163).
• Fixed behavior with arbitrary status codes (Implement a Read Only Flag to prevent any write operations #164).
• Fixed handling of multiple responses with the same match (Default to an empty string for email when email is None #165).
• Fixed default path behavior with match_querystring (Have tox create a postgres for testing #166).

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

Happy merging! 🤖