Update project rxjs to v2.2.27

libgrabber updated project rxjs to v2.2.27.

@Reactive-Extensions

### Metadata information

```json
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    },
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    "branchVersions": []
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  "updated": true,
  "updatePath": "/home/jsdelivr/files/rxjs/2.2.27",
  "branch": "rxjs/v2.2.27"
}
```