Describe the bug

useModal().create accepts the returnBoolean option in its second argument. The typing of modal.show indicates it can return BvTriggerableEvent | boolean | null, so I would have expected it to return boolean in this case. However, it still returns BvTriggerableEvent when returnBoolean is set to true.

I'd personally like to see an API that doesn't require type guards, which brings two options to mind:

1. Remove returnBoolean and always return BvTriggerableEvent
2. Make returnBoolean impact the return type (VueUse does crazy stuff like this)

As an aside, I also don't know of a situation where null should be returned, so it would be nice if the return type was only BvTriggerableEvent.

Reproduction

https://stackblitz.com/edit/github-y6vc86fd?file=src%2FApp.vue

Used Package Manager

pnpm