versioning added

Author: pawelbaran

BHoM_Engine/Query/ExtensionMethodHierarchy.cs

@@ -35,6 +35,7 @@ public static partial class Query
         /**** Public Methods                            ****/
         /***************************************************/
 
+        [PreviousVersion("8.0", "BH.Engine.Base.Query.ExtensionMethodHierarchy(System.Collections.Generic.IEnumerable<System.Reflection.MethodInfo>, System.Type)")]
         [Description("Builds a hierarchy of methods based on distance of each method's input parameter to the correspondent input type, first to first, second to second etc." +
             "\nThree levels of hierarchy are returned:" +
             "\n- first level of hierarchy groups the output by order of inputs, i.e. first sublist corresponds to first input type and first method parameter, second to second etc." +