Fixed AppVeyor file errors

Author: Kralizek

appveyor.yml

@@ -23,16 +23,18 @@ install:
 build_script:
   - cmd: dotnet cake --target=Full
 
-test: off
+test: false
 
 artifacts:
   - path: outputs\*.nupkg
     name: packages
+    type: NuGetPackage
   - path: outputs\*.snupkg
     name: symbols
+    type: NuGetPackage
   - path: outputs\tests\report
     name: report
-    type: zip
+    type: Zip
 
 deploy:
   - provider: Environment