add method set configuration (#69)

Author: dangost

src/Regula.DocumentReader.WebClient/Api/DocumentReaderApi.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using Regula.DocumentReader.WebClient.Client;
 using Regula.DocumentReader.WebClient.Model;
 using Regula.DocumentReader.WebClient.Model.Ext;
 
@@ -16,6 +17,12 @@ public DocumentReaderApi(string basePath)
             this._processApi = new ProcessApi(basePath);
         }
 
+        public Configuration Configuration
+        {
+            get => this._processApi.Configuration;
+            set => this._processApi.Configuration = value;
+        }
+
         private string License { get; set; }
 
         public RecognitionResponse Process(ProcessRequest processRequest)