Update project fuelux to 3.1.0

libgrabber updated project fuelux to 3.1.0.

@ExactTarget

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "fuelux",
    "repo": "ExactTarget/fuelux",
    "files": {
      "basePath": "dist/",
      "exclude": ["fuelux.zip"],
      "include": ["**/*"]
    },
    "path": "/home/jsdelivr/files/fuelux",
    "localVersions": ["2.3.0", "2.3.1", "2.4.0", "3.0.1", "3.0.2"],
    "remoteVersions": ["2.0.0", "2.0.1", "2.0.2", "2.1.0", "2.1.1", "2.2.0", "2.2.1-devdeps", "2.2.1", "2.3.0", "2.3.1", "2.4.0", "2.4.1", "2.4.2", "2.5.0", "2.5.1", "2.5.2", "2.6.0", "2.6.1", "2.6.2", "2.6.3", "2.6.4", "3.0.0", "3.0.1", "3.0.2", "3.1.0"],
    "branchVersions": []
  },
  "version": "3.1.0",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/fuelux/3.1.0",
  "branch": "fuelux/3.1.0"
}
```