Update project webmail-linker to 0.1.21

libgrabber updated project webmail-linker to 0.1.21.

@sebbo2002

### Metadata information

```json
{
  "metadata": {
    "packageManager": "npm",
    "name": "webmail-linker",
    "repo": "sebbo2002/webmail-linker.js",
    "files": {
      "basePath": "lib/browser/",
      "include": ["webmail-linker.min.js", "webmail-linker.min.js.map"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/webmail-linker.js",
    "localVersions": ["0.1.6", "0.1.7", "0.1.9", "0.1.19"],
    "remoteVersions": ["0.1.0", "0.1.1", "0.1.2", "0.1.3", "0.1.4", "0.1.6", "0.1.7", "0.1.9", "0.1.18", "0.1.19", "0.1.21"],
    "branchVersions": []
  },
  "version": "0.1.21",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/webmail-linker.js/0.1.21",
  "branch": "webmail-linker/0.1.21"
}
```