fixed issue #4706 , upgrade fastjson 2.0.31

pom.xml

@@ -222,7 +222,7 @@
             <dependency>
                 <groupId>com.alibaba.fastjson2</groupId>
                 <artifactId>fastjson2</artifactId>
-                <version>2.0.28</version>
+                <version>2.0.31</version>
             </dependency>
             <dependency>
                 <groupId>com.google.guava</groupId>