1.2.13

FIXES

• #122: Prevent empty checkboxes property in the saved state when state saving is disabled.
• #128: Allow single rows selection/deselection when Select style is set to "os".
• Corrected issue when selected rows are incorrectly reported in function defined by selectCallback when "Select All" checkbox is clicked.
• Use Object.prototype.hasOwnProperty.call() instead of hasOwnProperty() to check for property existence.