Add formatter option (#48)

* Fixes #44 and #38

* improves invocation of formatter

* adds labels element with display and formatter options

* removes types test which needs more time

* removes useless brackets

* Fix type of `raw` in scriptable context

* Update deps

* Add descriptors, requireVersion

* adds test cases on labels

* changes dependency with chart.js 3.6.0

* commits package lock

Co-authored-by: kurkle <jukka.kurkela@gmail.com>

README.md

@@ -1,6 +1,6 @@
 # chartjs-chart-treemap
 
-[Chart.js](https://www.chartjs.org/) **v3.0.0** module for creating treemap charts. Implementation for Chart.js v2 is in [2.x branch](https://github.com/kurkle/chartjs-chart-treemap/tree/2.x)
+[Chart.js](https://www.chartjs.org/) **v3.6.0** module for creating treemap charts. Implementation for Chart.js v2 is in [2.x branch](https://github.com/kurkle/chartjs-chart-treemap/tree/2.x)
 
 [![npm](https://img.shields.io/npm/v/chartjs-chart-treemap.svg)](https://www.npmjs.com/package/chartjs-chart-treemap)
 [![release](https://img.shields.io/github/release/kurkle/chartjs-chart-treemap.svg?style=flat-square)](https://github.com/kurkle/chartjs-chart-treemap/releases/latest)