Update hypothesis requirement from <5.10.6 to <5.11.1

Updates the requirements on [hypothesis](https://github.com/HypothesisWorks/hypothesis) to permit the latest version.
- [Release notes](https://github.com/HypothesisWorks/hypothesis/releases)
- [Commits](HypothesisWorks/hypothesis@hypothesis-ruby-0.0.1...hypothesis-python-5.11.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

test_requirements.txt

@@ -1,4 +1,4 @@
 pytest<6
-hypothesis<5.10.6
+hypothesis<5.11.1
 coverage==5.1
 attrs==19.3.0