add stubs for timeit (#1064)

stdlib/2and3/timeit.pyi

@@ -0,0 +1,33 @@
+# Stubs for timeit (Python 2 and 3)
+
+import sys
+from typing import Any, Callable, Dict, IO, List, Optional, Text, Tuple, Union
+
+_str = Union[str, Text]
+_Timer = Callable[[], float]
+_stmt = Union[_str, Callable[[], Any]]
+
+default_timer = ...  # type: _Timer
+
+class Timer:
+    if sys.version_info >= (3, 5):
+        def __init__(self, stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...,
+                     globals: Optional[Dict[str, Any]] =...) -> None: ...
+    else:
+        def __init__(self, stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...) -> None: ...
+    def print_exc(self, file: Optional[IO[str]] = ...) -> None: ...
+    def timeit(self, number: int = ...) -> float: ...
+    def repeat(self, repeat: int = ..., number: int = ...) -> List[float]: ...
+    if sys.version_info >= (3, 6):
+        def autorange(self, callback: Optional[Callable[[int, float], Any]] = ...) -> Tuple[int, float]: ...
+
+if sys.version_info >= (3, 5):
+    def timeit(stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...,
+               number: int = ..., globals: Optional[Dict[str, Any]] =...) -> float: ...
+    def repeat(stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...,
+               repeat: int = ..., number: int = ..., globals: Optional[Dict[str, Any]] =...) -> List[float]: ...
+else:
+    def timeit(stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...,
+               number: int = ...) -> float: ...
+    def repeat(stmt: _stmt = ..., setup: _stmt = ..., timer: _Timer = ...,
+               repeat: int = ..., number: int = ...) -> List[float]: ...