[TypeScript] Index signature is missing in type 'DefaultAddOptions'

[roblav96]

Since upgrading typescript@3.5.1 I get this compile error:

node_modules/p-queue/index.d.ts:81:54 - error TS2344: Type 'DefaultAddOptions' does not satisfy the constraint 'QueueAddOptions'.
  Index signature is missing in type 'DefaultAddOptions'.

81  EnqueueOptionsType extends PQueue.QueueAddOptions = PQueue.DefaultAddOptions
                                                        ~~~~~~~~~~~~~~~~~~~~~~~~

My tsconfig.json looks like:

{
	"compilerOptions": {
		"lib": ["esnext"],
		"module": "commonjs",
		"target": "es5"
	}
}

[callmehiphop]

I think the issue is that TypeScript@3.5 made a breaking change where

{ [k: string]: unknown } is no longer a wildcard assignment target

Their suggestion is to use any instead of unknown, which appears to fix the issue for me, but I'm not sure if that's the way to go or not.