bs4Dash 2.1.0

Breaking change

Align with shiny and remove position from tabsetPanel(). This was long time deprecated.

Remove echarts4r suggest causing #240.
Fix issue in bs4DashGallery() and tabsetPanel(). We now use bs4Dash::tabsetPanel().
Fix issue with navbar theme. #268. Thanks @etiennebacher.
Allow type = "hidden" for tabsetPanel. Fixes #248.
Fix regression introduced in 2.0.3: renderMenu() not working. See #234
Update Github actions.
Add bs4Dash class for card binding. Thanks @galachad.
Typo in vignette. Thanks @Duque-de-Sealand.
Wrong parameter in doc. Thanks @zoezhang106.
Add new .list param to tabBox() to allow programmatically generated items, like in tabsetPanel(). Thanks @mtopart