Switch from codecov to coveralls

[hardbyte]

As suggested in #1363 (comment)

[zariiii9003]

@hardbyte Can the warning be avoided?

Warning: The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

[zariiii9003]

I like this overview better than codecov 👍

[hardbyte]

@hardbyte Can the warning be avoided?

Warning: The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

We can call coveralls (the Python cli program) directly, but I assume at some point (ideally before the feature is deprecated) the coveralls action will be updated - coverallsapp/github-action#135

[felixdivo]

I like this overview better than codecov

+1