Update project jquery.validation to 1.13.1

libgrabber updated project jquery.validation to 1.13.1.

@jzaefferer

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "jquery.validation",
    "repo": "jzaefferer/jquery-validation",
    "files": {
      "basePath": "dist/",
      "include": ["**/*"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/jquery.validation",
    "localVersions": ["1.11.1", "1.12.0", "1.13.0"],
    "remoteVersions": ["1.8.0pre", "1.8.0", "1.8.1", "1.9.0", "1.10.0", "1.11.0", "1.11.1", "1.12.0", "1.13.0", "1.13.1"],
    "branchVersions": []
  },
  "version": "1.13.1",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/jquery.validation/1.13.1",
  "branch": "jquery.validation/1.13.1"
}
```