fix: rn-steps flex, #656
fix: rn-steps flex, #656

bccsafe/ant-design-mobile,ddcat1115/ant-design-mobile,ant-design/ant-design-mobile,ant-design/ant-design-mobile,ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,ddcat1115/ant-design-mobile,ddcat1115/ant-design-mobile,ddcat1115/ant-design-mobile,ant-design/ant-design-mobile,bccsafe/ant-design-mobile,bccsafe/ant-design-mobile,ant-design/ant-design-mobile,bccsafe/ant-design-mobile