# Testing
coverage==5.5                    # Test coverage
flake8==3.8.4                    # Python linting
mypy==0.800                      # Type checking

# Testing
coverage==5.5                    # Test coverage
flake8==3.9.0                    # Python linting
mypy==0.800                      # Type checking

Update flake8 package to 3.9.0
Update flake8 package to 3.9.0
