Bump version number

Author: mfeurer

openml/__init__.py

@@ -26,7 +26,7 @@
 from .tasks import OpenMLTask, OpenMLSplit
 from .flows import OpenMLFlow
 
-__version__ = "0.4.0dev"
+__version__ = "0.5.0dev"
 
 
 def populate_cache(task_ids=None, dataset_ids=None, flow_ids=None,