bumps version to 0.0.4

Author: Jesse Pollak

setup.py

@@ -10,7 +10,7 @@
 
 setup(
     name='mixpanel-py-async',
-    version='0.0.3',
+    version='0.0.4',
     author='Jesse Pollak',
     author_email='[email protected]',
     packages=['mixpanel_async'],