add integer and uinteger

For completness, these datatypes are abstract! If they are used in structs, abstract types are either Variant or ExtensionObjects.
If they only contain basic types (int16, float, double..) they are Variants.

asyncua/ua/uatypes.py

@@ -927,6 +927,13 @@ def get_shape(mylist):
     return dims
 
 
+# For completness, these datatypes are abstract!
+# If they are used in structs, abstract types are either Variant or ExtensionObjects.
+# If they only contain basic types (int16, float, double..) they are Variants
+UInteger = Variant
+Integer = Variant
+
+
 @dataclass(frozen=True)
 class DataValue:
     """