Clicking an event dot throws "$event.stopPropagation is not a function" error

[Poledouris]

Bug description / Feature request:

When clicking on an event dot, the click isn't happening, only the error "$event.stopPropagation is not a function" is thrown. This worked on the previous version of the calendar I was using (0.12.0)

For bugs only, a link to minimally working plunker that reproduces the issue (you can fork a starter from any of the demos)

This happens in your demo:
https://mattlewis92.github.io/angular-calendar/#/clickable-events

Versions

Angular:
4.1.2
Calendar library:
0.15.2
Browser name and version:
Chrome, IE, Edge, Firefox

[Poledouris]

Installed 0.15.4 and it works great, thanks!