Allow for passing in more addOptions?

[seanstrom]

Hey @paol-imi 👋 ,

I have a question about what is considered to be valid addOptions for a MuuriComponent.
Based on the documentation for Muuri's add method, addOptions could allow for both the active and layout properties to be defined, is this a good idea? At the moment I'm maintaining a forked version of Muuri-React and would like to merge those changes here, but I wanted to ask for your thoughts before I sent a PR.

P.S. Thanks for the great work on Muuri-React 👍