Support chartjs 4

[mnutt]

This builds off of @alexbakker's work in upgrading to chartjs 3.

• some typing changes
• adds bar chart support and 'stacked' options; I found these useful for prometheus graphs that were counts

[samber]

awesome

i will release a v2 for this library 🚀

thanks for the upgrade

[alexbakker]

Thanks for dragging this across the finish line!