fix(iQueryableExtensions): use TypeHelper

better type conversion for Guids

Author: jaredcnance

src/JsonApiDotNetCore/Extensions/IQueryableExtensions.cs

@@ -78,7 +78,7 @@ public static IQueryable<TSource> Filter<TSource>(this IQueryable<TSource> sourc
             {
                 // convert the incoming value to the target value type
                 // "1" -> 1
-                var convertedValue = Convert.ChangeType(filterQuery.PropertyValue, property.PropertyType);
+                var convertedValue = TypeHelper.ConvertType(filterQuery.PropertyValue, property.PropertyType);
                 // {model}
                 var parameter = Expression.Parameter(concreteType, "model");
                 // {model.Id}