Update project gmap3 to v6.0.0

libgrabber updated project gmap3 to v6.0.0.

@jbdemonte

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "gmap3",
    "repo": "jbdemonte/gmap3",
    "files": {
      "basePath": "dist/",
      "include": ["gmap3.min.js", "gmap3.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/gmap3",
    "localVersions": ["5.1.1"],
    "remoteVersions": ["v5.1.1", "v6.0.0"],
    "branchVersions": []
  },
  "version": "v6.0.0",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/gmap3/6.0.0",
  "branch": "gmap3/v6.0.0"
}
```