fixed yaml dump parameter

cvargparse/_version.py

@@ -1 +1 @@
-__version__ = "0.5.2"
+__version__ = "0.5.4"

cvargparse/utils/dataclass.py

@@ -48,7 +48,7 @@ def cvdataclass(cls=None, *args, repr=False, **kwargs):
 
 	def _yaml_repr_(self) -> str:
 		cls_name = type(self).__name__
-		return yaml.dump({cls_name: self.__dict__}, sort_dicts=False)
+		return yaml.dump({cls_name: self.__dict__}, sort_keys=False)
 
 	def wrap(cls):
 		if not repr: