• fix: #3139 Utils:removeInternalForSave() to skip arrays

• fix: #3136 more tweaks to save(columnCount) option.

• fix: #2493 added save(columnCount) option. Nested grid now use container saved column count.

• feat: #3047 added .grid-stack-dragging to grid when child is being dragged so we can set cursor:grabbing. Updated demo.
• feat: now using typedoc to generate doc (HTML and markup) from code. improved code examples and comments.
• fix: #3099 scroll take into account ScrollContainer position
• fix: #3102 React demo now support multiple grids
• fix: #3021 correctly reset widget back (to last known position) when released outside

• fix: #3070 incorrect property name 'sizeToContent' when cleaning up invalid attributes
• fix: #3077 incorrect node._id check
• fix: #3054 Avoid reflows via explicitly setting minRow
• fix: #3085 opts.minRow being updated

feat: #3061 added GridStack.updateCB(w) that gets called after a widget has been updated (eg: load() after initial layout) instead of created

• fix #3043 fix opts.animate again
• fix #3048 nested grid resizeToContentCBCheck() fix

• fix #3038 updateOptions() fix opts.minRow being undefined

• feat #2671 subgrid now propagate events to topmost grid. Use el.gridstackNode.grid to know which (sub) grid.
• fix #3028 updateOptions() no longer modifies passed in struct. only field we check are being handled too.
• fix #3029 resizeToContent() fix for nested grid with content above
• fix #3030 resizeToContentCheck() wasn't blocking _ignoreLayoutsNodeChange at end of the loop
• rem #3022 removed ES5 support (IE doesn't support CSS vars needed now)
• rem #3027 remove legacy code support for disableOneColumnMode, oneColumnSize, oneColumnModeDomSort

• feat: #2854 Removed dynamic stylesheet and migrated to CSS vars. Thank you lmartorella
• feat: #3013 columns no longer require custom classes nor gridstack-extra.css as we now use CSS vars.
• fix: #2978 Very slow operation in 11.2.0 and higher with large blocks
• fix: #2947 loading responsive layout:'list' into smaller screen doesn't layout correctly.