Memory leak

[sulkaharo]

Nightscout users who are using mmconnect in NS are now reporting the site crashes every couple days due to running out of memory. The issues seems to be isolated to this module; help checking where the leak is would be great.

[mddub]

@bewest and others did a big rewrite in July, and are continuing development in nightscout/minimed-connect-to-nightscout. He's also the owner of the npm package now. Sorry we haven't made the status of this repo more clear.