use node "12" on AppVeyor

etpinard · etpinard · commit dff2d0b00b8d · 2019-10-30T14:38:58.000-04:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,5 +1,5 @@
 environment:
-  nodejs_version: "10"
+  nodejs_version: "12"
 
 install:
   - ps: Install-Product node $env:nodejs_version
