Add tuple/list/dictionary for output return value

[pazzarpj]

#18 #19 Show the need for a different output format.

For tuple:

def test() -> typing.Tuple[int, float, str]:
    pass

Should output something like

// No Comment
STATIC mp_obj_t test() {
    int ret_val_0;
    float ret_val_1;
    char[] ret_val_2;

    //Your code here

    mp_obj_t ret_val[] = {
        mp_obj_new_int(ret_val_0),
        mp_obj_new_float(ret_val_1),
        mp_obj_new_str(ret_val_2, strlen(ret_val_2)),
    };
    return mp_obj_new_tuple(3, ret_val);
}

Or maybe have a custom type hint for fixed length strings

def string(length: int):
    class tmp:
        def __init__(self, length: int):
            self.length = length
            self.type = str

    return typing.NewType("string", tmp(length))

def test() -> typing.Tuple[int, float, string(5)]:
    pass