fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMALIBABA-2859222

Author: snyk-bot

pom.xml

@@ -105,7 +105,7 @@
             <dependency>
                 <groupId>com.alibaba</groupId>
                 <artifactId>fastjson</artifactId>
-                <version>1.2.75</version>
+                <version>1.2.83</version>
             </dependency>
             <dependency>
                 <groupId>com.github.dreamhead</groupId>