Update project classjs to v1.0.68

libgrabber updated project classjs to v1.0.68.

@atmajs

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "classjs",
    "repo": "atmajs/classjs",
    "files": {
      "basePath": "lib/",
      "include": ["class.min.js", "class.min.js.map"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/classjs",
    "localVersions": ["1.0.66", "1.0.67"],
    "remoteVersions": ["v1.0.67", "v1.0.68"],
    "branchVersions": []
  },
  "version": "v1.0.68",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/classjs/1.0.68",
  "branch": "classjs/v1.0.68"
}
```