Add tests for multiline descriptions and completed state
Fix caldav descriptions
Fix caldav task complete status for OpenTasks
Co-authored-by: Martin Giger <martin@humanoids.be>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/697
Co-Authored-By: freaktechnik <martin@humanoids.be>
Co-Committed-By: freaktechnik <martin@humanoids.be>