Add custom css for expand icon

[Kanww]

Hello :)

After the discovery of the Expand function, I thought it would be great to add a custom class to change the expand-icon color.
I did the change on my side like this (if other people are interested):

style.css file in vue3-east-data-table/dist : Add in :root{} - L1, col 8310
--easy-table-body-expand-icon-color: #212121;
style.css file in vue3-east-data-table/dist : Changed - L1, col 15210
border-color:var(easy-table-body-row-font-color) to border-color:var(--easy-table-body-expand-icon-color)

You can now use --easy-table-body-expand-icon-color into a custom style like explain here.