Update hypothesis from 3.45.0 to 3.50.2

Author: pyup-bot

dev-requirements.txt

@@ -5,7 +5,7 @@ dodgy==0.1.9  # Look for uploaded secrets
 flake8==3.5.0  # Lint
 flake8-quotes==0.13.0  # Require single quotes
 freezegun==0.3.9  # Freeze time in tests
-hypothesis==3.45.0  # Generate test cases
+hypothesis==3.50.2  # Generate test cases
 isort==4.3.4  # Lint imports
 mypy==0.560  # Type checking
 pip_check_reqs==2.0.1