Update setup.py

Author: rucarrol

setup.py

@@ -5,7 +5,7 @@
 
 setuptools.setup(
     name="traceflow",
-    version="0.3",
+    version="0.4",
     author="Ruairi Carroll",
     author_email="ruairi.carroll@gmail.com",
     description="Python version of traceroute which is path aware",