Lintrule "invalid-void" should permit Promise<void>

[Akuukis]

Bug Report

• TSLint version: 5.19.0
• TypeScript version: 3.5.3
• Running TSLint via: CLI

I generally support invalid-void lint rule

Restrict invalid usage of void type. For example, as property type or in type enumerations. I believe the void type should be used as return type only and be alone (without any kind of intersection types - see examples below).

But I suggest to permit Promise<void> return type also. IMO it's wrong to force to change all of them to Promise<undefined>, that only escalates to TS error: A function whose declared type is neither 'void' nor 'any' must return a value.ts(2355)

TypeScript code being linted

async function myAsyncFn(): Promise<void> {
    return Promise.resolve()
}

Actual behavior

Fails lint rule invalid-void #4732

Expected behavior

Passes

[adidahiya]

duplicate of #4828