Add state() to allow users to check the current state of the socket

[fwilkerson]

Since the underlying web socket is no longer returned, we lost access to some properties. While we can easily track the readyState using the different lifecycle methods, it would be nice to have a quick getter.

self.state= () => {
    return ws.readyState; 
};

[lukeed]

Could you save the ws reference from onopen's Event object?

let _ws;
const ws = new Sockette('...', {
  onopen(e) {
    console.log('>Connected! 🎉');
    _ws = e.target; // saved
  }
});

It will also update the _ws variable on reconnects.

[fwilkerson]

Yep that'll work just fine and doesn't add to the size of sockette.

[lukeed]

Perfecto~!