autoReconnect: false is an counter-intuitive default

[friedow]

While writing my own Bot I faced the problem that the Bot was disconnecting after ~20h. In the end clearly, a problem caused by the autoReconnect: false option in the Discordie constructor. I debugged and searched some time before finding another GitHub issue (#57) where another user had the exact same problem. That's why I suggest that the default should be autoReconnect: true.