Fix[1134] mouseEnter/Leave/Move deprecations by adding event listeners

[Shajansheriff]

Fix 1134

[betocantu93]

interesting, I didn't realized you could write native class for mixins!

[Shajansheriff]

@betocantu93 We have to replace mixins with native class or with some other patterns. Mixins are going to be removed, however we need to have a roadmap for refactor, because we are using quite a handful of mixins in our addon.

[Shajansheriff]

@miguelcobain Do you have any idea why those two specific tests are failing? It is passing in my local.

[miguelcobain]

@Shajansheriff interesting workaround for the deprecation. That didn't cross my mind.
The failing tests are unrelated, as you probably guess.
Those tests are flaky, and I suspect are related to using ember vertical collection. Usually they pass after retrying them some times.
Since it's related I'll merge this even if they don't pass.

[alex9nadon]

@miguelcobain Hi, did you plan to merge and create a new release?