Update project jquery.selectric to 1.8.4

libgrabber updated project jquery.selectric to 1.8.4.

@lcdsantos

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "jquery.selectric",
    "repo": "lcdsantos/jQuery-Selectric",
    "files": {
      "basePath": "dist/",
      "include": ["jquery.selectric.min.js", "selectric.css"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/jquery.selectric",
    "localVersions": ["1.6.5"],
    "remoteVersions": ["1.5.1", "1.5.2", "1.5.3", "1.5.4", "1.5.5", "1.5.6", "1.5.7", "1.5.8", "1.5.9", "1.6.0", "1.6.1", "1.6.2", "1.6.4", "1.6.5", "1.6.6", "1.6.7", "1.6.8", "1.7.0", "1.7.1", "1.7.2", "1.7.3", "1.8.0", "1.8.1", "1.8.2", "1.8.3", "1.8.4"],
    "branchVersions": []
  },
  "version": "1.8.4",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/jquery.selectric/1.8.4",
  "branch": "jquery.selectric/1.8.4"
}
```