Update annotations for requests.api (#844)

Argument params of requests.api.get accepts not only dictionaries of str, str pairs, but dictionaries and tuples of various types.

Author: WouldYouKindly

third_party/2/requests/api.pyi

@@ -1,15 +1,16 @@
-# Stubs for requests.api (Python 3)
+# Stubs for requests.api (Python 2)
 
-from typing import Union, Optional, AnyStr
+from typing import Union, Optional, Iterable, Dict, Tuple
 
 from .models import Response
 
 def request(method: str, url: str, **kwargs) -> Response: ...
 
 def get(url: Union[str, unicode],
-        params: Optional[Union[dict[Union[str, unicode],
-                                    Union[str, unicode]],
-                               Union[str, unicode]]]=None,
+        params: Optional[
+            Union[Dict[Union[str, unicode, int, float], Union[str, unicode, int, float, Iterable[Union[str, unicode, int, float]]]],
+                  Union[str, unicode],
+                  Tuple[Union[str, unicode, int, float], Union[str, unicode, int, float, Iterable[Union[str, unicode, int, float]]]]]] = None,
         **kwargs) -> Response: ...
 
 def options(url: Union[str, unicode], **kwargs) -> Response: ...