Add special methods for object (#774)

* Add special methods for object

* Add __format__ to 2/__builtin__.pyi too

* Remove redundant __format__ from float.

Author: z33ky

stdlib/2/__builtin__.pyi

@@ -39,6 +39,9 @@ class object:
     def __str__(self) -> str: ...
     def __repr__(self) -> str: ...
     def __hash__(self) -> int: ...
+    def __format__(self, format_spec: str) -> str: ...
+    def __getattribute__(self, name: str) -> Any: ...
+    def __delattr__(self, name: str) -> None: ...
 
 class type:
     __bases__ = ...  # type: Tuple[type, ...]
@@ -162,7 +165,6 @@ class float(SupportsFloat, SupportsInt, SupportsAbs[float]):
     def __float__(self) -> float: ...
     def __abs__(self) -> float: ...
     def __hash__(self) -> int: ...
-    def __format__(self, format_spec: AnyStr) -> str: ...
 
 class complex(SupportsAbs[float]):
     @overload

stdlib/3/builtins.pyi

@@ -42,6 +42,9 @@ class object:
     def __str__(self) -> str: ...
     def __repr__(self) -> str: ...
     def __hash__(self) -> int: ...
+    def __format__(self, format_spec: str) -> str: ...
+    def __getattribute__(self, name: str) -> Any: ...
+    def __delattr__(self, name: str) -> None: ...
 
 class type:
     __bases__ = ...  # type: Tuple[type, ...]
@@ -151,7 +154,6 @@ class float(SupportsFloat, SupportsInt, SupportsAbs[float]):
     def __float__(self) -> float: ...
     def __abs__(self) -> float: ...
     def __hash__(self) -> int: ...
-    def __format__(self, format_spec: str) -> str: ...
 
 class complex(SupportsAbs[float]):
     @overload
@@ -639,7 +641,6 @@ class enumerate(Iterator[Tuple[int, _T]], Generic[_T]):
     def __init__(self, iterable: Iterable[_T], start: int = 0) -> None: ...
     def __iter__(self) -> Iterator[Tuple[int, _T]]: ...
     def __next__(self) -> Tuple[int, _T]: ...
-    # TODO __getattribute__
 
 class range(Sequence[int]):
     @overload