Update project spf to 2.1.0

libgrabber updated project spf to 2.1.0.

@youtube

### Metadata information

```json
{
  "metadata": {
    "packageManager": "npm",
    "name": "spf",
    "repo": "youtube/spfjs",
    "files": {
      "basePath": "dist/",
      "include": ["**/*"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/spf",
    "localVersions": ["2.0.0", "2.0.1"],
    "remoteVersions": ["2.0.0-alpha.1", "2.0.0-alpha.2", "2.0.0-beta.1", "2.0.0-beta.2", "2.0.0", "2.0.1", "2.1.0"],
    "branchVersions": []
  },
  "version": "2.1.0",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/spf/2.1.0",
  "branch": "spf/2.1.0"
}
```