Update project ui-sortable to v0.13.1

libgrabber updated project ui-sortable to v0.13.1.

@angular-ui

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "ui-sortable",
    "repo": "angular-ui/ui-sortable",
    "files": {
      "include": ["sortable.min.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/angular.ui-sortable",
    "localVersions": ["0.12.10", "0.12.11", "0.13.0"],
    "remoteVersions": ["src0.12.5", "src0.12.6", "src0.12.7", "src0.12.8", "src0.12.9", "src0.12.10", "src0.12.11", "src0.13.0", "src0.13.1", "v0.0.1", "v0.10.0", "v0.10.1", "v0.12.0", "v0.12.1", "v0.12.2", "v0.12.3", "v0.12.4", "v0.12.5", "v0.12.6", "v0.12.7", "v0.12.8", "v0.12.10", "v0.12.11", "v0.13.0", "v0.13.1"],
    "branchVersions": []
  },
  "version": "v0.13.1",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/angular.ui-sortable/0.13.1",
  "branch": "ui-sortable/v0.13.1"
}
```