I'm thinking that this needs to be turned into a test for levelup so we can make sure it's behaving correctly. Looking at the new source for `ReadStream` though it does look like `'close'` *should* be emitted, see [here](https://github.com/rvagg/node-levelup/blob/386f3cd87374bc37869fa4cbd3aa2565a2aa30ba/lib/read-stream.js#L106-L111).