Update project pace to v0.5.6

libgrabber updated project pace to v0.5.6.

@HubSpot

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "pace",
    "repo": "HubSpot/pace",
    "files": {
      "include": ["pace.min.js", "pace.js", "./themes/**/*"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/pace",
    "localVersions": ["0.4.10", "0.4.16", "0.4.17", "0.5.5"],
    "remoteVersions": ["v0.4.0", "v0.4.1", "v0.4.2", "v0.4.3", "v0.4.4", "v0.4.5", "v0.4.6", "v0.4.7", "v0.4.8", "v0.4.9", "v0.4.10", "v0.4.11", "v0.4.12", "v0.4.13", "v0.4.14", "v0.4.15", "v0.4.16", "v0.4.17", "v0.4.18", "v0.5.0", "v0.5.1", "v0.5.2", "v0.5.3", "v0.5.4", "v0.5.5", "v0.5.6"],
    "branchVersions": []
  },
  "version": "v0.5.6",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/pace/0.5.6",
  "branch": "pace/v0.5.6"
}
```