Update appveyor.yml

Author: jamesmontemagno

appveyor.yml

@@ -1,4 +1,4 @@
-version: 4.0.{build}
+version: 4.0.0-beta{build}
 assembly_info:
   patch: true
   file: '**\AssemblyInfo.*'
@@ -14,4 +14,4 @@ artifacts:
 - path: ./Build/nuget/*.nupkg
   name: NuGet
 - path: ./component/*.xam
-  name: Component
+  name: Component