bump version to 0.3

Author: vdloo

setup.py

@@ -2,7 +2,7 @@
 setup(
     name ='consul_kv',
     packages=['consul_kv'],
-    version='0.2',
+    version='0.3',
     description='Consul KV client for Python 3',
     author='Rick van de Loo',
     author_email='rickvandeloo@gmail.com',