Add missing classes to distutils.version (#450)

stdlib/2and3/distutils/version.pyi

@@ -0,0 +1,35 @@
+# Stubs for distutils.version (Python 2 and 3.5)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+import sys
+from typing import Any
+
+class Version:
+    def __init__(self, vstring=None): ...
+
+    if sys.version_info >= (3,):
+        def __eq__(self, other): ...
+        def __lt__(self, other): ...
+        def __le__(self, other): ...
+        def __gt__(self, other): ...
+        def __ge__(self, other): ...
+
+class StrictVersion(Version):
+    version_re = ...  # type: Any
+    version = ...  # type: Any
+    prerelease = ...  # type: Any
+    def parse(self, vstring): ...
+
+    if sys.version_info < (3,):
+        def __cmp__(self, other): ...
+
+class LooseVersion(Version):
+    component_re = ...  # type: Any
+    def __init__(self, vstring=None): ...
+    vstring = ...  # type: Any
+    version = ...  # type: Any
+    def parse(self, vstring): ...
+
+    if sys.version_info < (3,):
+        def __cmp__(self, other): ...