REQUEST: add support for ImageOverlay

[AndreasAtakan]

Hi all!

I would very much like to be able to call bindContextMenu on a L.ImageOverlay object.
Alternatively, any tips on how I might implement this myself?

Thanks!

[AndreasAtakan]

UPDATE

I simply added L.ImageOverlay to the array here (in my local file):
https://github.com/aratcliffe/Leaflet.contextmenu/blob/master/src/Mixin.ContextMenu.js#L82

Seems to work just fine