sabre/vobject 3.4.2 release
We just released sabre/vobject 3.4.2.
This version contains a bugfix in the iTip/scheduling system that prevented attendees from responding to certain invites.
Upgrade sabre/vobject by running:
composer update sabre/vobject
If this didn't upgrade you to 3.4, make sure that your composer.json file has a line that looks like this:
"sabre/vobject" : "~3.4"
Full changelog of this release can be found on Github.