Commented Issue: [BUG] Exposed IDispatchEx instances don't support dynamic properties [96]

Exposed COM objects that implement `IDispatchEx` should provide full dynamic access (a-la `IPropertyBag`).
Comments: Fixed in [Version 5.4.4](https://clearscript.codeplex.com/SourceControl/changeset/4d6048f4be2d433dbfb7de01d05eb5cb33b42007).