Mongo "pushResults" option

[aterna01]

Hi and thank you for the package!
Observed a small typo in the readMe. As per docs if want to stream down the result of the mongo operation then need to pass extra option {"pushResults": true}. However the correct option is {"pushResult": true}

.pipe(etl.mongo.update(collection, ["_id"], {"pushResult": true}))
.pipe(etl.map(mongoResult => {
      
}))