False positive "Unused External Import" in rollup during v2 addon build

[lfloyd117]

If using the task imported from ember-concurrency in a v2 Ember addon, rollup will complain during build time that the import is unused:

"task" imported from external module "ember-concurrency" but never used

It appears that after transpilation, the JS output in dist changes the task to import and use buildTask, which may play a roll in this.
This is with using the task syntax of:

myTask: Task<void, [number]> = task({ restartable: true }, async (value: number) => {