Update project bootstrap.daterangepicker to v1.3.15

libgrabber updated project bootstrap.daterangepicker to v1.3.15.

@dangrossman

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "bootstrap.daterangepicker",
    "repo": "dangrossman/bootstrap-daterangepicker",
    "files": {
      "include": ["daterangepicker-bs2.css", "daterangepicker-bs3.css", "daterangepicker.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/bootstrap.daterangepicker",
    "localVersions": ["1.3.5", "1.3.13", "1.3.14"],
    "remoteVersions": ["1.3.1", "v1.3.2", "v1.3.3", "v1.3.4", "v1.3.5", "v1.3.6", "v1.3.7", "v1.3.8", "v1.3.9", "v1.3.10", "v1.3.11", "v1.3.12", "v1.3.13", "v1.3.14", "v1.3.15"],
    "branchVersions": []
  },
  "version": "v1.3.15",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/bootstrap.daterangepicker/1.3.15",
  "branch": "bootstrap.daterangepicker/v1.3.15"
}
```