@ember/ordered-set interop with ember-source@3.5

[rwjblue]

When ember-data (emberjs/data#4e0bc45) is used with ember-source 3.5 (current canary emberjs/ember.js#04dec4f9) the following error occurs:

Reported in slack by @NullVoxPopuli.

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When ember-source hits 3.5 we no longer are leveraging @ember/ordered-set from Ember itself (see here), and instead we are using the version in the addon.

The error occurs because we are mixing native classes (because the implementation in the addon does not get transpiled) and ES5 style classes.

[runspired]

Fixed in #5557

[NullVoxPopuli]

/giphy party time