• break: remove GridStackOptions.minWidth obsolete since 5.1, use oneColumnSize instead
• optimize: CSS files now even 25% smaller (after being halfed in 8.0.0) by removing .grid-stack prefix for anything already gs based, and 3 digit rounding.
• fix: #2275 setupDragIn() signature tweaks (HTMLElement | Document)
• feat: #2205 added GridStackOptions.draggable.cancel for list of selectors that should prevent item dragging