fix for windows 2

Author: MatthD

appveyor.yml

@@ -18,7 +18,7 @@ install:
   - npm install -g npm
   - set PATH=%APPDATA%\npm;%PATH%
   - npm i nan
-  - npm install -g node-pre-gyp
+  - npm install -g node-pre-gyp@0.6.39
   - npm install -g node-pre-gyp-github
 
 build_script:

package.json

@@ -33,6 +33,6 @@
     "node-pre-gyp"
   ],
   "devDependencies": {
-    "node-pre-gyp": "0.6.39"
+    "node-pre-gyp": "0.6.38"
   }
 }