Bump version 0.5.1

Author: B-Stefan

setup.py

@@ -20,7 +20,7 @@
 
 setup(
     name='prov-db-connector',
-    version='0.5.0',
+    version='0.5.1',
     description='PROV Database Connector',
     keywords=[
         'provenance', 'graph', 'model', 'PROV', 'PROV-DM', 'PROV-JSON', 'JSON',