v3.9.0

• feat: improve a11y behavior (#354) 06a04d0
• type: narrow onChange argument to React.Key[] (#352) 5b50798
• fix(a11y): assign correct role when collapsible prop is 'icon' or 'header' (#353) d403776
• test: use unified github action yml (#351) 44a5d48

v3.8.0...v3.9.0