Update npm dep to npm@3

I'm using cordova. My system has NPM@3.3.12 on Node 4.1.2.

I tried Node 5, NPM 3.3.12, NPM 3.3.6 (was working on 3.3.6 about a month ago). Was working on Node 4.1.1

Cordova-Lib has NPM@2 as a dependency, which NPM@2 gets installed under my project node_modules folder.

The NPM team recommends Cordova-Lib updates the dependency to use NPM@3 ASAP. https://github.com/npm/npm/issues/10234#issuecomment-153710853

```
async@1.5.0 .cordova\hooks\node_modules\async
[12:01:32] '<anonymous>' errored after 2.55 s
[12:01:32] ReferenceError: resolver is not defined
at null._onTimeout (c:\git\pos\node_modules\npm\lib\install.js:840:7)
at Timer.listOnTimeout (timers.js:92:15)
[12:01:32] 'cordova:debug' errored after 40 s
[12:01:32] ReferenceError: resolver is not defined
at null._onTimeout (c:\git\pos\node_modules\npm\lib\install.js:840:7)
at Timer.listOnTimeout (timers.js:92:15)
```