Update project peerjs to 0.3.9

libgrabber updated project peerjs to 0.3.9.

@peers

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "peerjs",
    "repo": "peers/peerjs",
    "files": {
      "basePath": "dist/",
      "include": ["peer.min.js", "peer.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/peerjs",
    "localVersions": ["0.0.1", "0.1.6", "0.2.7", "0.3.8"],
    "remoteVersions": ["0.1.0", "0.1.5", "0.1.6", "0.1.7", "0.2.0", "0.2.1", "0.2.5", "0.2.6", "0.2.7", "0.2.8", "0.3.0", "0.3.1", "0.3.2", "0.3.3", "0.3.4", "0.3.5", "0.3.6", "0.3.7", "0.3.8", "0.3.9"],
    "branchVersions": []
  },
  "version": "0.3.9",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/peerjs/0.3.9",
  "branch": "peerjs/0.3.9"
}
```