Upgrading dependency

Author: gnongsie

test/packages.config

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="NUnit" version="2.6.4" targetFramework="net45" />
-  <package id="RestSharp" version="105.1.0" targetFramework="net45" developmentDependency="true" />
+  <package id="RestSharp" version="106.12.0" targetFramework="net45" developmentDependency="true" />
   <package id="Newtonsoft.Json" version="10.0.3" targetFramework="net45" developmentDependency="true" />
 </packages>