Es kann nicht mehr aktualisiert werden: Dependency Error
[Composer\DependencyResolver\SolverProblemsException]
Problem 1
- nesbot/carbon 1.39.1 requires symfony/translation ~2.6 || ~3.0 || ~4.0 -> no matching package found.
- quiqqer/calendar dev-dev requires johngrogg/ics-parser 2.1.5 -> satisfiable by johngrogg/ics-parser[v2.1.5].
- johngrogg/ics-parser v2.1.5 requires nesbot/carbon ~1.28 -> satisfiable by nesbot/carbon[1.39.1].
- Installation request for quiqqer/calendar dev-dev -> satisfiable by quiqqer/calendar[dev-dev].