Convert to V2 Addon

[machty]

Notes:

• Minimum version is 3.28 now after getting rid of macros that were used to preserve pre-tracked computed property infrastructure

[NullVoxPopuli]

That's a long plugin name!

Thoughts on?:

"ember-concurrency/babel"?

It'd require a a prefix to use without require.resolve, like:

module:ember-concurrency/babel

[machty]

Ah yeah, I meant to rename this. Will DM you about module:..., don't know too much about that.

[machty]

I shortened it; seems to work fine with require.resolve:

    babel: {
      plugins: [
        require.resolve('ember-concurrency/async-arrow-task-transform'),
      ],
    },