revert: ci(travis): "fix" version mismatch for pytest-cov
revert: ci(travis): "fix" version mismatch for pytest-cov

This reverts commit 0eb5745406b6e40ecdad1155f9bbd3b73c80d880.

With the updated pytest version, I hope it works again.

FallenWarrior2k/cardinal.py,FallenWarrior2k/cardinal.py