reusing websocket in _send function

[nfreeze]

Hi, thanks for making this. It looks like you create a new websocket for each call of _send. It also looks like there is a 1 second delay for some reason. What if you reused the websocket like this?

_send(command, done, eventHandle) {
        let self = this;
        if (self.ws) {
            self.ws.send(JSON.stringify(command));
            return;
        }

        const ws = new WebSocket(this.WS_URL, {rejectUnauthorized: false});

        ws.on('close', function () {
            self.ws = null;
        })

        ws.on('open', () => {
            if (this.PORT === 8001) {
                setTimeout(() => ws.send(JSON.stringify(command)), 500);
            } else {
                ws.send(JSON.stringify(command));
            }
        });
        ws.on('message', (message) => {
            const data = JSON.parse(message);
            this.LOGGER.log('data: ', JSON.stringify(data, null, 2), 'ws.on message');
            if (done && (data.event === command.params.event || data.event === eventHandle)) {
                this.LOGGER.log('if correct event', JSON.stringify(data, null, 2), 'ws.on message');
                done(null, data);
            }
            if (data.event !== 'ms.channel.connect') {
                this.LOGGER.log('if not correct event', JSON.stringify(data, null, 2), 'ws.on message');
                ws.close();
            }
        });
        ws.on('response', (response) => {
            this.LOGGER.log('response', response, 'ws.on response');
        });
        ws.on('error', (err) => {
            let errorMsg = '';
            if (err.code === 'EHOSTUNREACH' || err.code === 'ECONNREFUSED') {
                errorMsg = 'TV is off or unavailable';
            }
            console.error(errorMsg);
            this.LOGGER.error(errorMsg, err, 'ws.on error');
            if (done) {
                done(err, null);
            }
        });

        self.ws = ws;
}

[fivethreeo]

Just needs a check for token