Fixes #506 It should be possible to update the computed values when updating a collection

Author: Jonas Ledel

arangodb-net-standard/CollectionApi/Models/PostCollectionBody.cs

@@ -150,6 +150,7 @@ public class PostCollectionBody
         /// </summary>
         public CollectionSchema Schema { get; set; }
 
+        /// <summary>
         /// Optional. A list of computed values.
         /// </summary>
         public List<ComputedValue> ComputedValues { get; set; }

arangodb-net-standard/CollectionApi/Models/PutCollectionPropertyBody.cs

@@ -1,4 +1,6 @@
-namespace ArangoDBNetStandard.CollectionApi.Models
+using System.Collections.Generic;
+
+namespace ArangoDBNetStandard.CollectionApi.Models
 {
     public class PutCollectionPropertyBody
     {
@@ -53,5 +55,10 @@ public class PutCollectionPropertyBody
         /// The collection level schema for documents.
         /// </summary>
         public CollectionSchema Schema { get; set; }
+        
+        /// <summary>
+        /// A list of computed values.
+        /// </summary>
+        public List<ComputedValue> ComputedValues { get; set; }
     }
 }