#514 (comment)

* https://github.com/actions/cache/releases
* https://github.com/actions/checkout/releases
* https://github.com/actions/setup-node/releases

* Add pivot table with limitations

```js
worksheet.addPivotTable(configuration);
```

**Note:** Pivot table support is in its early stages with certain limitations, including:

- Xlsx files with existing pivot tables can't be read (writing is supported).
- Pivot table configurations must have one "value"-item and use the "sum" metric.
- Only one pivot table can be added for the entire document.

* Update README

* fix table column style bug and addTable colum type

* make TableColumnProperties.style optional