Update project tauCharts to 0.2.21

libgrabber updated project tauCharts to 0.2.21.

@TargetProcess

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "tauCharts",
    "repo": "TargetProcess/tauCharts",
    "files": {
      "basePath": "build/",
      "include": ["*.min.*", "./css/*.min.*", "./plugins/*.min.*"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/taucharts",
    "localVersions": ["0.1.0", "0.1.1", "0.1.2", "0.1.3", "0.1.4", "0.1.5", "0.1.6", "0.1.7", "0.1.9", "0.1.11", "0.1.12", "0.1.13", "0.1.14", "0.1.15", "0.1.16", "0.1.17", "0.1.18", "0.1.19", "0.2.0", "0.2.2", "0.2.3", "0.2.4", "0.2.5", "0.2.6", "0.2.7", "0.2.8", "0.2.9", "0.2.12"],
    "remoteVersions": ["0.1.0", "0.1.1", "0.1.2", "0.1.3", "0.1.4", "0.1.5", "0.1.6", "0.1.7", "0.1.9", "0.1.10", "0.1.11", "0.1.12", "0.1.13", "0.1.14", "0.1.15", "0.1.16", "0.1.17", "0.1.18", "0.1.19", "0.2.0", "0.2.1", "0.2.2", "0.2.3", "0.2.4", "0.2.5", "0.2.6", "0.2.7", "0.2.8", "0.2.9", "0.2.10", "0.2.11", "0.2.12", "0.2.13", "0.2.14", "0.2.15", "0.2.16", "0.2.17", "0.2.18", "0.2.19", "0.2.20", "0.2.21"],
    "branchVersions": ["0.2.20"]
  },
  "version": "0.2.21",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/taucharts/0.2.21",
  "branch": "tauCharts/0.2.21"
}
```