update setup.py

Author: Joohwan Oh

setup.py

@@ -7,7 +7,7 @@
 setup(
     name="py-arango",
     description="Python Driver for ArangoDB",
-    version="1.3.0",
+    version="1.4.0",
     author="Joohwan Oh",
     author_email="joowani88@gmail.com",
     url="https://github.com/Joowani/py-arango",