recommendation: calendar backend library vkurko/calendar

[mrvnklm]

Hello, as I have some custom needs I decided to work with a javascript calendar library instead of using this package for now, but I wanted to suggest the following library for future versions:

https://github.com/vkurko/calendar

• really lightweight and performant
• many views out of the box
• developer is really active fixing issues
• interactivity features if needed in the future

If I have the time, I would like to help to integrate it into v2, after the initial release, as I use it in my custom nova tool already.
I might post some pictures of my usecase including event and resource filtering. Might be interesting for #26