Port away from event based stream #24

No way to tell when an event based stream ends. So essentially need to port into a transform stream that takes obo and emits parsed [Term]s. Perhaps throws you header with .on('header') or something.

Best way to do this?

What happens now:

line events emitted, then lines are added into string buffers using some flags and buffers. Checking what the current line is, emit header once, and emit stanza which is piped through stanzaParser, filtered, ndjsonified, etc.

Events was a nice way to separate concerns. So it was good for prototyping. But the output stream not having a defined end is not good. So some way to either force in the end event, or move out of using events. A little bit stumped, so any suggestions would be awesome. Perhaps I should move back to "vanilla" streams instead of wrapping with highland, and build buffers based on current character and flags. If anyone knows any good examples of streaming parsers, that would be good to see too.