Better support for older browsers

Just some small compatibility fixes for old browsers.

Fixes

Thanks to @lifeiscontent for fixing an IE compatibility issue.

Also updated some dependencies that were flagged as potential security vulnerabilities.

Bound values for custom actions

With this release, SpaceAce adds native support for bound values. Before this version, you had to use .bind, but this has issues with TypeScript and is a bit too verbose. Now you can pass extra values along with the custom action to the space to bind the values.

e.g.

<div>
  <button onClick={space(handleClick, 'submit')}>Submit</button>
</div>
…
function handleClick({ merge },  clickType, event) {
  console.log(clickType); // submit
  …
}

Middleware support

Merry X-Mas! The most requested feature of SpaceAce finally lands, and in SpaceAce fashion it's a bit unconventional.

I've been asked many times when SpaceAce would get Middleware support. I looked at how Redux did Middleware, and it of course felt far too user unfriendly for SpaceAce. It took a while, but I think I've come up with a SpaceAcey way to do middleware. It's done by super-charging subscribers.

What is middleware for? What's the easiest way to enable developers to do what's needed, while keeping the library itself as simple as possible? As far as I can tell, Middleware is used for a few things:

1. Cancelling a change.
2. Altering a change.
3. Side effects caused by a change, e.g. logging, triggering an async request, etc.

The third case was already being taken care of by subscribers. With this latest release, subscribers can also cancel a change or alter it.

To cancel a change, have your subscriber call the passed in cancel function. When you do this, no further subscribers will be invoked, and not parent space subscribers will be called either.

To alter a change, have your subscriber return an object that should be used instead. This new object will be turned into a space, inserted at the appropriate spot in the tree, and further subscribers will be called, with the new space instead.

Check out the details in the updated Readme.

Cheers!
-Jon