Continuous integration using Github Actions instead travis

[kerautret]

PR Description

Following the migration of DGtal done by @dcoeurjo (see PR 1591)

Checklist

• [x] Doxygen documentation of the code completed (classes, methods, types, members...)
• [x] Check if it follows the tools structure described in CONTRIBUTING.md
• [x] New entry in the ChangeLog.md added.
• [ ] Update the readme with potentially a screenshot of the tools if it applies.
• [ ] No warning raised in Debug cmake mode (otherwise, Travis C.I. will fail).