Bump gson to 2.8.9

Author: yeikel

jprotoc/pom.xml

@@ -59,7 +59,7 @@
 
         <!-- Dependency Versions -->
         <protoc.version>3.15.8</protoc.version>
-        <gson.version>2.7</gson.version>
+        <gson.version>2.8.9</gson.version>
         <mustache-java.version>0.9.4</mustache-java.version>
 
         <!-- Test Dependency Versions -->