BLD: Bump version for next release

Author: QuLogic

cycler/__init__.py

@@ -51,7 +51,8 @@
 # Dict, List, Union required for runtime cast calls
 from typing import TypeVar, Generic, Callable, Union, Dict, List, Any, overload, cast
 
-__version__ = "0.12.1"
+
+__version__ = "0.13.0.dev0"
 
 K = TypeVar("K", bound=Hashable)
 L = TypeVar("L", bound=Hashable)