Update hypothesis from 3.69.9 to 3.70.0

Author: pyup-bot

dev-requirements.txt

@@ -7,7 +7,7 @@ flake8==3.5.0  # Lint
 flake8-commas==2.0.0  # Require silicon valley commas
 flake8-quotes==1.0.0  # Require single quotes
 freezegun==0.3.10  # Freeze time in tests
-hypothesis==3.69.9  # Generate test cases
+hypothesis==3.70.0  # Generate test cases
 isort==4.3.4  # Lint imports
 mypy==0.620  # Type checking
 pip_check_reqs==2.0.3