Bump eluceo/ical from 0.10.1 to 0.16.0

Bumps [eluceo/ical](https://github.com/markuspoerschke/iCal) from 0.10.1 to 0.16.0.
- [Release notes](https://github.com/markuspoerschke/iCal/releases)
- [Changelog](https://github.com/markuspoerschke/iCal/blob/master/CHANGELOG.md)
- [Commits](https://github.com/markuspoerschke/iCal/compare/0.10.1...0.16.0)

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -27,7 +27,7 @@
         "ext-filter" : "*",
         "ext-session" : "*",
         "christian-riesen/otp" : "1.4.3",
-        "eluceo/ical": "0.10.1",
+        "eluceo/ical": "0.16.0",
         "erusev/parsedown" : "^1.7",
         "pimple/pimple" : "3.2.3",
         "psr/log": "~1.0",