V 4.0

1. Recurring events:
   We have added the functionality to help users schedule recurring events(daily/weekly/monthly)
2. Reminder:
   We have added the functionality to remind users when the event starts
3. Snooze Reminder:
   We have added the functionality to help users snooze a reminder of the event by 15 minutes
4. Edit Event:
   We have added the functionality to help user edit their event details
5. Delete Event:
   We have fixed the Delete Event functionality which helps user delete their events
6. Send event details to other users:
   We have added the functionality to make events more collaborative by sending event details to other members involved in the event.