don't build on windows node 4, as npm install is weird

sokra · sokra · commit 9c50c34ab5fb · 2016-07-21T00:15:30.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -9,7 +9,6 @@ environment:
   matrix:
     - nodejs_version: 6
     - nodejs_version: 5
-    - nodejs_version: 4
 
 install:
   - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version)
