Add "ownProps" argument for stateToComputed/dispatchToActions

This is something react-redux does. For us it might look like:

{{user-detail userId=567}}

const stateToComputed = (state, ownProps) => {
  return {
    user: getUserById(state, ownProps.userId)
  }
}

I think this should be simple to add. react-redux defines this argument as

the props passed to your component

so we’re not talking about all possible properties on the Ember Component, just what was passed to it, which Ember stores in attrs.

We can pass in attrs to the functions, and then listen to didUpdateAttrs

so connect would be something like

...

handleChange() {  // and also in init
  ...
  let props = stateToComputed(redux.getState(), this.attrs);
  ...
},

didUpdateAttrs() {
  this.handleChange();
}

[dustinfarris]

Unless someone sees something wrong with this, I will spin up a PR tomorrow.

[toranb]

@dustinfarris ah right on 😃