Using tokenless Codecov action

[SVilgelm]

Replace the Coveralls Travis CI and GitHub Actions Yes step with Codecov action when they implemented the tokenless upload: codecov/codecov-action#29

[SVilgelm]

/remind me to check the status of action on next Monday

[reminders]

@SVilgelm set a reminder for Feb 17th 2020

[reminders]

👋 @SVilgelm, check the status of action

[SVilgelm]

/remind me on next Monday

[reminders]

@SVilgelm set a reminder for Feb 24th 2020

[reminders]

👋 @SVilgelm,

[ziirish]

We can give it a new try now.

[SVilgelm]

Sure, I will do it