Update project chartist.js to v0.3.1

libgrabber updated project chartist.js to v0.3.1.

@gionkunz

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "chartist.js",
    "repo": "gionkunz/chartist-js",
    "files": {
      "basePath": "libdist/",
      "include": ["chartist.min.map", "chartist.min.js", "chartist.min.css"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/chartist.js",
    "localVersions": ["0.1.10", "0.1.11", "0.1.12", "0.1.13", "0.1.14", "0.1.15", "0.2.0", "0.2.1", "0.2.2", "0.2.3", "0.2.4", "0.3.0"],
    "remoteVersions": ["v0.0.3", "v0.0.4", "v0.0.5", "v0.1.0", "v0.1.1", "v0.1.2", "v0.1.3", "v0.1.4", "v0.1.5", "v0.1.6", "v0.1.7", "v0.1.8", "v0.1.9", "v0.1.10", "v0.1.11", "v0.1.12", "v0.1.13", "v0.1.14", "v0.1.15", "v0.2.0", "v0.2.1", "v0.2.2", "v0.2.3", "v0.2.4", "v0.3.0", "v0.3.1"],
    "branchVersions": []
  },
  "version": "v0.3.1",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/chartist.js/0.3.1",
  "branch": "chartist.js/v0.3.1"
}
```