Allow Adding Custom Query Parameters

[meSmashsta]

This will make it cross-compatible across the Couch family (IBM CouchDB, Couchbase's Sync Gateway 1.5 & below, etc).

For example, if I were to use _changes API of Sync Gateway 1.5 (or below) I will not be able to use the filter param which is the equivalent of CouchDB's selector.

This feature will look like something like this:

const db = nano.db.use('mydb')
db.changesReader.start({ filter: 'sync_gateway/bychannel', channels: 'channel1,channel2' })

[kanongil]

I need something like this to update.