Give Helpers Precedence Over Properties

[iezer]

As mentioned in emberjs/ember.js#17120 (comment)

If an app has a helper and property with the same name, Ember 3.4 will always call the helper first (when using AngleBracket invocation). However, this polyfill accesses the property first.

This polyfill should be changed to be consistent with Ember.

Behavior reproduced in Ember 3.4 with this twiddle