Made Base64UrlHelper.Encode(byte[]) public (#252)

* make Encode(byte[]) public for keyvault

* <clear />

* only nuget left

Author: isra-fel

NuGet.config

@@ -1,9 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
-    <add key="local-packages" value="local-packages" />
+    <clear />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
-    <add key="dotnet-core" value="https://dotnet.myget.org/F/dotnet-core/api/v3/index.json" />
-    <add key="powershell-core" value="https://powershell.myget.org/F/powershell-core/api/v3/index.json" />
   </packageSources>
 </configuration>

src/Common/Utilities/Base64UrlHelper.cs

@@ -78,7 +78,7 @@ public static byte[] DecodeToBytes(string arg)
             return Convert.FromBase64String(s); // Standard base64 decoder
         }
 
-        internal static string Encode(byte[] arg)
+        public static string Encode(byte[] arg)
         {
             if (arg == null)
             {