Try to fix appveyor failure

bdukes · bdukes · commit 9e7e91d461c2 · 2018-05-08T15:44:29.000-05:00
Something about powershell warnings being more real than cmd warnings
diff --git a/appveyor.yml b/appveyor.yml
@@ -6,7 +6,7 @@ cache:
 
 install:
   - ps: Install-Product node $env:nodejs_version
-  - ps: yarn install
+  - yarn install
 
 test_script:
   - node --version
