Check super annotations

[benhgreen]

Fixes / new features

• Don't warn useless-super-delegation if the subclass method has different type annotations. (useless-super-delegation when typing differs #1923)

[coveralls]

Coverage increased (+0.008%) to 89.92% when pulling d4dd540 on benhgreen:check-super-annotations into 5bc4529 on PyCQA:master.

[cschramm]

This expects annotations to have a type with attribute name and breaks simple samples like

from typing import List


class Test:
    def __init__(self, _arg: List[int]) -> None:
        super().__init__()

where it's Subscript and thus does not.