Upgrading dependency

Author: gnongsie

cybersource-rest-client-netstandard/cybersource-rest-client-netstandard.Test/cybersource-rest-client-netstandard.Test.csproj

@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="NUnit" Version="3.12.0" />
-    <PackageReference Include="RestSharp" Version="106.11.5" />
+    <PackageReference Include="RestSharp" Version="106.12.0" />
   </ItemGroup>
 
   <ItemGroup>

cybersource-rest-client-netstandard/cybersource-rest-client-netstandard/cybersource-rest-client-netstandard.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="CyberSource.Authentication.NetStandard" Version="0.0.1.4" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="RestSharp" Version="106.11.5" />
+    <PackageReference Include="RestSharp" Version="106.12.0" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="4.7.0" />
   </ItemGroup>