Update project chart.js to v1.0.1-beta.4

libgrabber updated project chart.js to v1.0.1-beta.4.

@nnnick

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "chart.js",
    "repo": "nnnick/Chart.js",
    "files": {
      "include": ["Chart.min.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/chart.js",
    "localVersions": [],
    "remoteVersions": ["v0.2.0", "v1.0.0-beta", "v1.0.1-beta", "v1.0.1-beta.2", "v1.0.1-beta.3", "v1.0.1-beta.4"],
    "branchVersions": []
  },
  "version": "v1.0.1-beta.4",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/chart.js/1.0.1-beta.4",
  "branch": "chart.js/v1.0.1-beta.4"
}
```