Messaging API Update - November 2021

[tkgauri]

News: https://developers.line.biz/en/news/2021/11/09/messaging-api-update/

• You can now retrieve the text entered by the user in a message sticker
• You can now retrieve up to 1000 user IDs of friends

[tokuhirom]

https://github.com/line/line-bot-sdk-java/blob/cbcb096023f2de84684751839656a0c458f6ee41/line-bot-model/src/main/java/com/linecorp/bot/model/event/message/StickerMessageContent.java

• [] Needs to add MESSAGE and CUSTOM to the enum StickerResourceType.
• [] Add text field to StrickerMessageContent

[tawAsh1]

#715 #716