Switch CI from Travis to GitHub actions

[szymon-owczarzak]

Description

We can use GitHub actions to run CI instead of another third party like Travis CI. Let's switch to GitHub!

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• Automated functional tests have been added or modified to cover my changes (if applicable)
• I have updated the documentation accordingly.

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I hereby agree to the terms of the Cogboard Contributor License Agreement.