Update cake addins

build.cake

@@ -2,8 +2,8 @@
 // ADDINS
 ///////////////////////////////////////////////////////////////////////////////
 
-#addin "nuget:?package=Polly&version=4.2.0"
-#addin "nuget:?package=NuGet.Core&version=2.12.0"
+#addin "nuget:?package=Polly&version=5.3.1"
+#addin "nuget:?package=NuGet.Core&version=2.14.0"
 #tool "nuget:?package=NuGet.CommandLine&version=4.3.0"
 #tool "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2017.1.20170613.162720"
 ///////////////////////////////////////////////////////////////////////////////