Add the nuget deploy section to the appveyor.yml

Author: kevinkuszyk

appveyor.yml

@@ -18,4 +18,12 @@ test_script:
   - cmd: dotnet test tests\FluentAssertions.AspNetCore.Mvc.Tests\FluentAssertions.AspNetCore.Mvc.Tests.csproj
 
 artifacts:
-  - path: '**\*.nupkg'
+  - path: '**\*.nupkg'
+  
+deploy:
+- provider: NuGet
+  api_key:
+    secure: /4N7ion7O3kWuiM5LEiU9oyfmPYGAbJxic7AFKSX/4Z1iiMwdxAUf3v7v6EvFgyZ
+  on:
+    branch: master
+    appveyor_repo_tag: true