Doesn't support EmberJS v4.x.x

[hergaiety]

Describe the bug
CI is failing trying to build this for ember-canary and ember-beta, I think this means it's failing on 4.x.x in general.

To Reproduce
Steps to reproduce the behavior:
Run the full test suite and watch it fail.

Expected behavior
Should support EmberJS v4.x.x and pass all tests.

Screenshots
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Desktop (please complete the following information):
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Additional context
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[MinThaMie]

I could give this a go :)

[hergaiety]

I could give this a go :)

That'd be lovely~ If you run into any issues feel free to hit me up in a Discord DM (find me in the Ember discord)