Reaching 100% coverage (pt 2)

[nylen]

The only line in the project that is "partially covered" is line 37 in priority-queue.ts:

https://github.com/sindresorhus/p-queue/blob/0131f7f74431c513dbd3817e041e27a54eb50f60/source/priority-queue.ts#L35-L38

This (and the method definition) seem to say that dequeue may return undefined, but when dequeue is actually used this is not the case (because the queue size is checked earlier in that method):

https://github.com/sindresorhus/p-queue/blob/4b4d2faf265ee7c1625f62c51b2fd5cf6fa6a9af/source/index.ts#L168

I'm not sure the best way to resolve this so created an issue about it instead. Would dequeue ever be expected to return undefined under normal usage? If not, should its result ever be undefined?