upgrade node-pre-gyp dep to 0.6.32

Author: defunctzombie

package.json

@@ -31,7 +31,7 @@
   "dependencies": {
     "bindings": "1.2.1",
     "nan": "2.5.0",
-    "node-pre-gyp": "0.6.30"
+    "node-pre-gyp": "0.6.32"
   },
   "devDependencies": {
     "nodeunit": "~0.9.1"