jquery.inputmask gives file not found error during rebuild of bundle

**I'm submitting a bug report**

* **Library Version:**
0.28.0

**Please tell us about your environment:**
* **Operating System:**
OSX 10.x|Linux (distro)|Windows [7|8|8.1|10]

* **Node Version:**
any

* **NPM Version:**
any

**Current behavior:**
1. `npm install jquery.inputmask jquery`
2. use the following config in aurelia.json:
```

"jquery",
{
"name": "jquery.inputmask",
"main": "index.js",
"path": "../node_modules/jquery.inputmask",
"resources": []
}
```
3. in app.js use `import 'jquery.inputmask';`
4. observe that `au run --watch` works fine initially, and in the browser `window.Inputmask` is available
5. in app.js, comment out the import line, save, and remove the comment again
6. observe the following error:

```
File not found or not accessible: C:/Development/aurelia-cli-instantsearch/src/inputmask.js. Requested by C:\Development\aurelia-cli-instantsearch\src\app.js
{ Error: ENOENT: no such file or directory, open 'C:\Development\aurelia-cli-instantsearch\src\inputmask.js'
at Object.fs.openSync (fs.js:584:18)
at Object.fs.readFileSync (fs.js:491:33)
at Object.exports.readFileSync (C:\Development\cli\lib\file-system.js:74:13)
at fileRead (C:\Development\cli\lib\build\bundled-source.js:101:27)
at Object.context.fileRead (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:179:18)
at Object.context.load (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:370:32)
at Module.load (eval at (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:14:1), :832:29)
at Module.fetch (eval at (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:14:1), :822:66)
at Module.check (eval at (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:14:1), :854:30)
at Module.enable (eval at (C:\Development\cli\lib\build\amodro-trace\lib\loader\Loader.js:14:1), :1173:22)
errno: -4058,
code: 'ENOENT',
syscall: 'open',
path: 'C:\\Development\\aurelia-cli-instantsearch\\src\\inputmask.js' }
```

**Expected/desired behavior:**

* **What is the expected behavior?**
it not to look for the inputmask.js (or related) file in that location