fix: Removing TypeAlias usage as its 3.10+

Author: fgmacedo

statemachine/state.py

@@ -1,7 +1,6 @@
 from typing import TYPE_CHECKING
 from typing import Any
 from typing import Dict
-from typing import TypeAlias
 from weakref import ref
 
 from .callbacks import CallbackMetaList
@@ -116,7 +115,8 @@ class State:
 
     """
 
-    Builder: TypeAlias = NestedStateBuilder
+    class Builder(metaclass=NestedStateFactory):
+        pass
 
     def __init__(
         self,