Minor change to the custom_nodes.py template that has some consequences for addons: use bpy.types.* base classes instead of bpy_types.*

The bpy_types classes cause issues when used in addons when loading on Blender startup (subclasses cannot be properly registered).

release/scripts/templates_py/custom_nodes.py

@@ -1,5 +1,5 @@
 import bpy
-from bpy_types import NodeTree, Node, NodeSocket
+from bpy.types import NodeTree, Node, NodeSocket
 
 # Implementation of custom nodes from Python