[@xstate/inspect]: Allow it to work in WebWorker/contexts withouut access to window

[kije]

I recently used xstate inside a WebWorker, where I performed some computation-intensive tasks and used xstate to represent the states of these computations.

However, as I discovered, there is currently no way to use @xstate/inspect to inspect xstate-machines running in a WebWorker or any other context where there is no window object available.

I think it would be handy if one could inspect the state machines in the dev-tools, even when they are running in a WebWorker.

[davidkpiano]

So would you want to use e.g., websockets instead?