Update dependency com.google.code.gson:gson to v2.8.9 [SECURITY]

Author: renovate[bot]

pom.xml

@@ -61,7 +61,7 @@
                 <dependency>
                     <groupId>com.google.code.gson</groupId>
                     <artifactId>gson</artifactId>
-                    <version>2.8.6</version>
+                    <version>2.8.9</version>
                 </dependency>
 
 	</dependencies>