Bump fastjson from 1.2.31 to 1.2.83 in /chat-src/chat#3

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dependabot/maven/chat-src/chat/com.alibaba-fastjson-1.2.83TomQunChao/SimpleChat:dependabot/maven/chat-src/chat/com.alibaba-fastjson-1.2.83Copy head branch name to clipboard