fix(appveyor): artifacts will be in a sub dir

Author: jaredcnance

appveyor.yml

@@ -13,7 +13,7 @@ build_script:
 - ps: .\Build.ps1
 test: off
 artifacts:
-- path: .\artifacts\**\*.nupkg
+- path: .\**\artifacts\**\*.nupkg
   name: NuGet
 deploy:
 - provider: NuGet