Converts a Lua value to a desired CLR type and wraps it in a userdata to avoid automatic conversions.
Example: a Lua script needs to pass a List`1 to a CLR method expecting System.Object, MoonSharp gets
in the way by converting the List`1 to a MoonSharp.Interpreter.Table and breaking everything.
Wrapping the value in a userdata preserves the original type during conversions.
1. should get the last loadded aseembly by checking its version instead of reversing.
2. fixed throw an exception when CsScriptRunner run the second time.
3. an argument carried by an UnregisterType called somewhere have had been accidentally removed.
