News: https://developers.line.biz/en/news/2020/10/08/flex-message-update-2-released/ 1. - [x] [Changed the maximum number of bubbles that can be included in a carousel](https://developers.line.biz/en/reference/messaging-api/#f-carousel) 2. - [x] [Box component has justifyContent and alignItems property](https://developers.line.biz/en/reference/messaging-api/#box) 3. - [x] [Use linear gradient as the background image for a box component by setting its background.type property equal to linearGradient.](https://developers.line.biz/en/reference/messaging-api/#box) 4. - [x] [Allowed an empty array to be specified as the value of a box's contents property](https://developers.line.biz/en/reference/messaging-api/#box) 5. - [x] [Added support for animated images](https://developers.line.biz/en/reference/messaging-api/#f-image) 6. - [x] [Changed how sizes are specified](https://developers.line.biz/en/news/2020/10/08/flex-message-update-2-released/#update-size) 1. - [x] [Image component](https://developers.line.biz/en/docs/messaging-api/flex-message-layout/#image-size) 2. - [x] [Icon, text, and span components](https://developers.line.biz/en/docs/messaging-api/flex-message-layout/#other-component-size) 7. - [x] [Allowed text to automatically shrink to fit a component's width](https://developers.line.biz/en/news/2020/10/08/flex-message-update-2-released/#update-adjust-mode) - [Text](https://developers.line.biz/en/reference/messaging-api/#f-text) and [Button](https://developers.line.biz/en/reference/messaging-api/#button) 8. - [x] [Spacer has been discontinued](https://developers.line.biz/en/news/2020/10/08/flex-message-update-2-released/#update-spacer)
