Merge pull request #141 from sevein/dev/issue-140-six-dep

setup: relax six dependency constraint

Author: ablwr

setup.py

@@ -26,7 +26,7 @@ def find_version(*file_paths):
 install_requires = [
     'olefile >= 0.4, < 1',
     'setuptools',
-    'six == 1.10.0',
+    'six >= 1.10.0, < 2',
 ]