Implicit function return types

[Vurv78]

function function test() {}

This is stupid. Lambdas don't need explicit return types, in fact you can't actually explicitly type them. Functions should be the same.

function test() {
    return function() {}
}

This should be valid and mark the function to return function.

If in the future we need explicit typing, I'd prefer typescript's syntax of function test(): number over the weird amalgam near-C version.