MAINT: Bump hypothesis from 6.3.0 to 6.3.4

Bumps [hypothesis](https://github.com/HypothesisWorks/hypothesis) from 6.3.0 to 6.3.4.
- [Release notes](https://github.com/HypothesisWorks/hypothesis/releases)
- [Commits](HypothesisWorks/hypothesis@hypothesis-python-6.3.0...hypothesis-python-6.3.4)

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

Author: dependabot-preview[bot]

test_requirements.txt

@@ -1,7 +1,7 @@
 cython==0.29.22
 wheel<0.36.3
 setuptools<49.2.0
-hypothesis==6.3.0
+hypothesis==6.3.4
 pytest==6.2.2
 pytz==2021.1
 pytest-cov==2.11.1