Bump com.alibaba:fastjson from 1.2.31 to 1.2.83 in /core

Bumps [com.alibaba:fastjson](https://github.com/alibaba/fastjson) from 1.2.31 to 1.2.83.
- [Release notes](https://github.com/alibaba/fastjson/releases)
- [Commits](alibaba/fastjson@1.2.31...1.2.83)

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

Signed-off-by: dependabot[bot] <[email protected]>

core/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>fastjson</artifactId>
-      <version>1.2.31</version>
+      <version>1.2.83</version>
     </dependency>
     <dependency>
       <groupId>joda-time</groupId>