fix version number and comply with PEP 440 (#4)

Author: danking

setup.py

@@ -4,7 +4,7 @@
 setup(
     name="jgscm",
     description="Jupyter Google Cloud Storage ContentsManager",
-    version="0.1.10-hail",
+    version="0.1.13+hail",
     license="MIT",
     author="Vadim Markovtsev",
     author_email="[email protected]",