add climutable attribute

Author: AngelMunoz

FSharp/FSharpRepoDB/FSharpRepoDB/Types.fs

@@ -2,7 +2,8 @@ namespace FSharpRepoDB
 
 /// Group your types and other constructs that allow you
 /// to represent your domain
-module Types = 
+module Types =
+    [<CLIMutable>]
     type Person = 
         { Id: int64
           Name: string