Set VS2017 as os in appveyor build script

kriskbx · kriskbx · commit dd54c5d819ff · 2018-08-26T17:56:07.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,6 +1,5 @@
-image:
+os:
   - Visual Studio 2017
-os: unstable
 cache:
   - node_modules -> yarn.lock
 branches:
