Failing test for and / or types

[Techn1x]

Just wanted to create this failing types test, as the v4 release didn't quite nail the and / or helper types

This might be partially resolved by #191 ? But I am not sure.

We probably want some return types like this (examples adapted from this example microsoft/TypeScript#31579 )

type Or<A extends boolean, B extends boolean> = A extends true
    ? A // A was truthy, returns itself
    : B extends true
        ? B // B was truthy, returns itself
        : B // last item in logical OR returns itself even if falsey
// for multiple args
type Or3<A extends boolean, B extends boolean, C extends boolean> = Or<A, Or<B, C>>

[Techn1x]

It seemed like these args were using the wrong helpers ? maybe?

[Techn1x]

Both of these args only accept strings.

But the types errors indicate that the and/or helpers are trying to provide them
boolean | string
undefined | string

[Techn1x]

It might seem that these are pedantic or not realistic, but I'm trying to cover a scenario like;

teacherId: string | undefined // may or may not be set
AllTeachersOptionId: "all-teachers" // always set

template
@teacherId={{or this.teacherId AllTeachersOptionId}}

[Techn1x]

This PR can be used or closed, I don't mind.

[SergeAstapov]

this is fixed in #196/#199