Lost connection with server? Sometimes, toots are no longer received
Stopping/restarting the bot cures the problem. Either we should restart the bot from time to time, or find a way to make it more robust, may be with [StreamListener.handle_heartbeat()](https://mastodonpy.readthedocs.io/en/latest/#streamlistener)
May be related to #4, and to issue 127 of Mastodon.py