Update project knockout to v3.3.0-alpha

libgrabber updated project knockout to v3.3.0-alpha.

@knockout

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "knockout",
    "repo": "knockout/knockout",
    "files": {
      "basePath": "dist/",
      "include": ["knockout.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/knockout",
    "localVersions": ["2.2.1", "2.3.0-rc", "2.3.0", "3.0.0-beta", "3.0.0", "3.1.0", "3.2.0"],
    "remoteVersions": ["v1.0.4", "v1.0.5", "v1.1.0", "v1.1.1", "v1.1.2", "v1.2.0", "v1.2.1", "v1.3.0beta", "v1.3.0rc", "v2.0.0rc", "v2.0.0rc2", "v2.0.0", "v2.1.0beta", "v2.1.0rc", "v2.1.0rc2", "v2.1.0", "v2.2.0rc", "v2.2.0", "v2.2.1", "v2.3.0rc", "v2.3.0", "v3.0.0beta", "v3.0.0rc", "v3.0.0", "v3.1.0beta", "v3.1.0", "v3.2.0-alpha", "v3.2.0-beta", "v3.2.0", "v3.3.0-alpha"],
    "branchVersions": []
  },
  "version": "v3.3.0-alpha",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/knockout/3.3.0-alpha",
  "branch": "knockout/v3.3.0-alpha"
}
```