bunch: use yaml.safe_load to avoid warnings

Author: koreno

easypy/bunch.py

@@ -87,7 +87,7 @@ def from_json(cls, d):
     @classmethod
     def from_yaml(cls, d):
         import yaml
-        return cls.from_dict(yaml.load(d))
+        return cls.from_dict(yaml.safe_load(d))
 
     @classmethod
     def from_xml(cls, d):