Fixed npm install issue

Author: madskristensen

appveyor.yml

@@ -2,9 +2,7 @@ image: Visual Studio 2017
 
 install:
   - ps: (new-object Net.WebClient).DownloadString("https://raw.github.com/madskristensen/ExtensionScripts/master/AppVeyor/vsix.ps1") | iex
-  - npm install [email protected] -g
-  - set PATH=%APPDATA%\npm;%PATH%
-  - npm --version
+    - npm --version
 
 before_build:
   - ps: Vsix-IncrementVsixVersion | Vsix-UpdateBuildVersion