update appveyor.yml

Author: Cap32

appveyor.yml

@@ -6,9 +6,9 @@ init:
 environment:
   matrix:
     # node.js
+    - nodejs_version: "10"
     - nodejs_version: "8"
     - nodejs_version: "6"
-    - nodejs_version: "4"
 
 platform:
   - x86
@@ -21,7 +21,6 @@ install:
   # install modules
   - npm i
 
-
 # Post-install test scripts.
 test_script:
   # Output useful info for debugging