build(deps): bump responses from 0.10.8 to 0.10.9

Bumps [responses](https://github.com/getsentry/responses) from 0.10.8 to 0.10.9.
- [Release notes](https://github.com/getsentry/responses/releases)
- [Changelog](https://github.com/getsentry/responses/blob/master/CHANGES)
- [Commits](getsentry/responses@0.10.8...0.10.9)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

travis/requirements.txt

@@ -1,7 +1,7 @@
 freezegun==0.3.12
 pytest==5.3.2
 pytest-asyncio==0.10.0
-responses==0.10.8
+responses==0.10.9
 pytest-cov==2.8.1
 pytest-random-order==1.0.4
 pytest-travis-fold==1.3.0