Fix vulnerability

Author: kmozsi

pom.xml

@@ -71,7 +71,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.8</version>
+            <version>2.8.9</version>
         </dependency>
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>