fix: update fastjson2 code.

Author: ‘niuerzhuang’

pom.xml

@@ -32,7 +32,7 @@
         <resilience4j.version>1.7.1</resilience4j.version>
         <!--  gson latest version for JDK6 -->
         <gson.version>2.8.9</gson.version>
-        <fastjson2.version>2.0.28</fastjson2.version>
+        <fastjson2.version>2.0.39</fastjson2.version>
         <jmh.version>1.23</jmh.version>
     </properties>