版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.esm.js
- https://cdn.bootcdn.net/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.esm.min.js
- https://cdn.bootcdn.net/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.js
- https://cdn.bootcdn.net/ajax/libs/chartjs-plugin-datalabels/2.2.0/chartjs-plugin-datalabels.min.js