Update project select2 to 3.5.1

libgrabber updated project select2 to 3.5.1.

@ivaynberg

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "select2",
    "repo": "ivaynberg/select2",
    "files": {
      "include": ["*.js", "*.css", "*.gif", "*.png"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/select2",
    "localVersions": ["3.3.1", "3.3.2", "3.4.0", "3.4.1", "3.4.2", "3.4.3", "3.4.4", "3.4.5", "3.4.6", "3.4.8"],
    "remoteVersions": ["1.0.0", "2.1.0", "3.0.0", "3.1.0", "3.2.0", "3.3.0", "3.3.1", "3.3.2", "3.4.0", "3.4.1", "3.4.2", "3.4.3", "3.4.4", "3.4.5", "3.4.6", "3.4.7", "3.4.8", "3.5.0", "3.5.1"],
    "branchVersions": []
  },
  "version": "3.5.1",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/select2/3.5.1",
  "branch": "select2/3.5.1"
}
```