Repair Python 3.4 support (python#27)

* Add a missing dependency for Python 3.4
* Fix coverage for Python 3.4

Author: warsaw

importlib_resources/_py3.py

@@ -17,7 +17,7 @@
 
 Package = Union[ModuleType, str]
 if sys.version_info >= (3, 6):
-    FileName = Union[str, os.PathLike]              # pragma: ge36
+    FileName = Union[str, os.PathLike]              # pragma: ge35
 else:
     FileName = str                                  # pragma: le35
 

setup.py

@@ -4,9 +4,15 @@
 
 
 requirements = []
+
+# Python 2 is missing pathlib in its stdlib.
 if sys.version_info < (3,):
     requirements.append('pathlib2')
 
+# Python 3.4 is missing typing in its stdlib.
+if (3,) <= sys.version_info < (3, 5):
+    requirements.append('typing')
+
 
 setup(
     name='importlib_resources',

tox.ini

@@ -28,7 +28,7 @@ setenv =
     py27: GEVER=3
     py27: OMIT=3
     py34: GEVER=35
-    py35: GEVER=36
+    py35: GEVER=35
     py36: GEVER=37
     py36: LEVER=35
     py34,py35,py36,py37: OMIT=2