Update project wp-slimstat to 3.7.4

libgrabber updated project wp-slimstat to 3.7.4.

@getusedtoit

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "wp-slimstat",
    "repo": "getusedtoit/wp-slimstat",
    "files": {
      "include": ["wp-slimstat.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/wp-slimstat",
    "localVersions": ["2.8.2", "2.8.3", "2.8.4", "2.8.5", "2.8.6", "2.8.7", "2.9.1", "2.9.2", "2.9.3", "2.9.4", "2.9.5", "3.2.1", "3.2.2", "3.2.3", "3.2.4", "3.2.5", "3.3.1", "3.3.2", "3.3.3", "3.3.4", "3.3.5", "3.3.6", "3.4.1", "3.4.2", "3.4.3", "3.5.1", "3.5.2", "3.5.3", "3.5.4", "3.5.5", "3.5.6", "3.5.7", "3.5.8", "3.5.9", "3.6.1", "3.6.2", "3.6.3", "3.6.4", "3.6.5", "3.6.6", "3.6.7", "3.6.8", "3.6.9", "3.7.1", "3.7.2", "3.7.3"],
    "remoteVersions": ["3.6.9", "3.7.1", "3.7.2", "3.7.3", "3.7.4"],
    "branchVersions": []
  },
  "version": "3.7.4",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/wp-slimstat/3.7.4",
  "branch": "wp-slimstat/3.7.4"
}
```