add more shortcuts node

Author: oroulet

opcua/common/shortcuts.py

@@ -16,3 +16,10 @@ def __init__(self, server):
         self.base_event_type = Node(server, ObjectIds.BaseEventType)
         self.base_variable_type = Node(server, ObjectIds.BaseVariableType)
         self.folder_type = Node(server, ObjectIds.FolderType)
+        self.enum_data_type = Node(server, ObjectIds.Enumeration)
+        self.types = Node(server, 86)
+        self.data_types = Node(server, 90)
+        self.event_types = Node(server, 3048)
+        self.reference_types = Node(server, 91)
+        self.variable_types = Node(server, 89)
+        self.object_types = Node(server, 88)