• Fixed the problem that DatePicker will throw error in split-panels mode. #4524
• Fixed the problem that DatePicker's panel will open when click the clear icon.
• Fixed the problem that DatePicker change the month, the left month was larger than the right. #3973
• Fixed the problem that FormItem could not be verified when using the required property. #4537

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• 修复 DatePicker 在 split-panels 模式下，有时报错的问题。 #4524
• 修复 DatePicker 点击清空图标时，弹出选择器的问题。
• 修复 DatePicker 切换月份时，左边月份比右边大的问题。 #3973
• 修复 FormItem 使用 required 属性时，无法校验的问题。 #4537