fix: Throw error if createStore is passed several enhancers

[selbekk]

This commit adds a check for whether the user is passing several
enhancers to the createStore function.

Fixes #3114.

[selbekk]

I added two checks - one if you're passing something like

createStore(reducer, func, anotherFunc) // throws

, and another one if you pass initial state as well:

createStore(reducer, { initial: 'state' }, func, anotherFunc) // throws

I'm up for changing whatever - but I'd love some feedback first!

[markerikson]

Looks good to me.

@timdorr , any objections?

[timdorr]

LGTM. Thanks!