Update pom.xml

Author: zheng-zy

spring-boot-mybatis-mulidatasource/pom.xml

@@ -53,7 +53,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.21</version>
+            <version>1.2.31</version>
         </dependency>
     </dependencies>