Work CD-CI

- Switch MyGet feed with Azure Artifacts feed.

Signed-off-by: José Simões <jose.simoes@eclo.solutions>

Author: josesimoes

source/NuGet.Config

@@ -2,6 +2,6 @@
 <configuration>
     <packageSources>
         <add key="NuGet" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
-        <add key="MyGet nanoFramework dev" value="https://www.myget.org/F/nanoframework-dev/api/v3/index.json" protocolVersion="3" />
+        <add key="Azure Artifacts nanoFramework dev" value="https://pkgs.dev.azure.com/nanoframework/feed/_packaging/sandbox/nuget/v3/index.json" protocolVersion="3" />
     </packageSources>
 </configuration>