Bump com.alibaba:fastjson in /arms-demo/mock-server

Bumps [com.alibaba:fastjson](https://github.com/alibaba/fastjson) from 1.2.67 to 1.2.83.
- [Release notes](https://github.com/alibaba/fastjson/releases)
- [Commits](alibaba/fastjson@1.2.67...1.2.83)

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

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Author: dependabot[bot]

arms-demo/mock-server/pom.xml

@@ -157,7 +157,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.67</version>
+            <version>1.2.83</version>
         </dependency>
 
         <dependency>