fix: type errors that occur when using ec >2.3

[chrisvdp]

With ember-concurrency 2.3 we no longer require these packages if we update all our tasks. If we want to use both syntaxes (with a large code base for example) then the exported types from this package and ember-concurrency-async create issues with types (see related PR here https://github.com/chancancode/ember-concurrency-async/pull/46).

This change proposes to publish a version of ember-concurrency-ts and ember-concurrency-async for use with ember-concurrency 2.3+ to help bridge the gap.

This would be a breaking change and only for users who have ember-concurrency 2.3+.

[chancancode]

@chrisvdp sorry I missed this, but in our codebase we end up skipping all the way and dropping these addons, so I don't know that I have the need/experience to review/maintain these addons in your mixed-usage environment. Are you still doing this and still using this patch? Ran into any issues? If so, would you be interested in being added as a maintainer?