Paginate a collection

[Naimdasb]

I think I found an issue with the example about this feature.

I had to add manually this to make it work.

Paginate a collection

const moreDocs = await ref
.orderBy(orderBy)
.startAfter(startAfterDocument)
.limit(limit)
.get()
.then(d => {
const docs = []
d.docs.forEach(doc => docs.push({ ...doc.data(), id: doc.id, __snapshot: doc }))
return docs
})

Thanks for your work!!

[nandorojo]

Mind adding a PR to the readme?