Binding { type: 'once', ... } fires Query.off which returns an error

Hi there!

I get an error after binding the data once, like this:

@firebaseConnect((props) => ([
  { type: 'once', path: DH.getUserProfile(props.uid) },
  { type: 'once', path: DH.getUserGoalsPath(props.uid) },
]))

Below is the error I get:

database.js:130 Uncaught Error: Query.off failed: first argument must be a valid event type: "value", "child_added", "child_removed", "child_changed", or "child_moved".
    at jf (http://localhost:8080/index.js:37664:156)
    at U.g.Ic (http://localhost:8080/index.js:37707:59)
    at unsetWatcher (http://localhost:8080/index.js:36456:46)
    at unWatchEvent (http://localhost:8080/index.js:34494:35)
    at http://localhost:8080/index.js:34516:13
    at Array.forEach (native)
    at unWatchEvents (http://localhost:8080/index.js:34515:18)
    at FirebaseConnect.componentWillUnmount (http://localhost:8080/index.js:31687:37)
    at http://localhost:8080/index.js:23652:26
    at measureLifeCyclePerf (http://localhost:8080/index.js:23318:13)

I figure this is because ‘once’ does not have any watchers which should be unset. However, couldn’t find a fix in the code. Would appreciate your help on this one!

[DeividasK]

Fix works.

[prescottprue]

Great to hear! Planning on releasing v1.2.0 in a few minutes (which will include this fix).