Firestore docChanges error

[handlebarcreative]

Firestore has adjusted their API, and docChanges is no longer a property, but a method... thus breaking the vuefire plugin when using Firestore.

This applies for the firebase npm module version ^5.0.0.

The error that gets reported is:

Uncaught Error: QuerySnapshot.docChanges has been changed from a property into a method, so usages like "querySnapshot.docChanges" should become "querySnapshot.docChanges()"
    at new FirestoreError (index.cjs.js?5a4f:346)
    at throwDocChangesMethodError (index.cjs.js?5a4f:17164)
    at Function.get (index.cjs.js?5a4f:17176)
    at Object.eval [as next] (vuefire.esm.js?8676:229)
    at next (index.cjs.js?5a4f:16990)
    at eval (index.cjs.js?5a4f:15021)

As a temporary workaround, include "firebase": "4.13.1" as a dependency in your package.json.