Merge branch 'py35_compat' of https://gitlab.com/asottile/importlib_resources (!90)

Author: jaraco

importlib_resources/_py3.py

@@ -1,6 +1,5 @@
 import os
 import sys
-import typing
 
 from . import abc as resources_abc
 from . import trees
@@ -14,6 +13,8 @@
 from typing import cast
 from typing.io import BinaryIO, TextIO
 
+if False:  # TYPE_CHECKING
+    from typing import ContextManager
 
 Package = Union[ModuleType, str]
 if sys.version_info >= (3, 6):
@@ -140,7 +141,7 @@ def files(package: Package) -> trees.Traversable:
 
 def path(
         package: Package, resource: Resource,
-        ) -> 'typing.ContextManager[Path]':
+        ) -> 'ContextManager[Path]':
     """A context manager providing a file path object to the resource.
 
     If the resource does not already exist on its own on the file system,