build(deps): bump fastjson from 1.2.49 to 1.2.83 in /user-server

Bumps [fastjson](https://github.com/alibaba/fastjson) from 1.2.49 to 1.2.83.
- [Release notes](https://github.com/alibaba/fastjson/releases)
- [Commits](alibaba/fastjson@1.2.49...1.2.83)

---
updated-dependencies:
- dependency-name: com.alibaba:fastjson
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

user-server/pom.xml

@@ -100,7 +100,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.49</version>
+            <version>1.2.83</version>
         </dependency>
         <!--data-->
         <dependency>