v2.0.1

lots of bugs fixes (half are regressions) now that people have switched to 2.0

• fix minWidth(), minHeight(), maxHeight() to set node value as well #1359
• fix GridStackOptions spelling #1359
• fix remove window resize event when grid.destroy() #1369
• fix nested grid resize #1361
• fix resize with cellHeight '6rem' '6em' not working #1356
• fix preserve attributes (min/max/id/etc...) when dragging between grids #1367
• fix 2 drop shadows when dragging between grids #393
  ^^^ always wanted to fix that one. 4 years later.