v3.9.0
clarify api docs (#10392)
Changed var to const/let in the docs (#9744)
Update charts.md (#9472)
Fix Stack Overflow tag: chart.js (#10522)
add beforeDestroy hook (#9933)
Document plugin event handling (#8828)
Fix a typo in index.md (#9900)
Correct chart initialization flow (#10266)
Document tooltip draw hooks and only call hooks when the tooltip draws (#10276)
document defaults for plugins (#10490)
Switch docs to Vuepress to match other chart.js repositories (#8751)
Document scale update plugin hooks (#10154)
