ETLMananger: fixed python3 support issue in save_state & bumped version

Author: RubyFeinstein

singular_api_client/etl_manager.py

@@ -191,7 +191,7 @@ def save_state(self):
         Commit the current state to disk
         """
         logger.info("Saving state")
-        pickle.dump(self.state, file(self.STATE_LOCATION, 'wb'))
+        pickle.dump(self.state, open(self.STATE_LOCATION, 'wb'))
         return
 
     @retry(wait_exponential_multiplier=1000, wait_exponential_max=60000,

singular_api_client/version.py

@@ -1 +1 @@
-__version__ = "0.5.2"
+__version__ = "0.5.3"