Updated jackson to the latest version (2.9.8).

pom.xml

@@ -62,7 +62,7 @@
     <!-- Converter Dependencies -->
     <gson.version>2.8.2</gson.version>
     <protobuf.version>3.0.0</protobuf.version>
-    <jackson.version>2.9.4</jackson.version>
+    <jackson.version>2.9.8</jackson.version>
     <wire.version>2.2.0</wire.version>
     <simplexml.version>2.7.1</simplexml.version>
     <moshi.version>1.5.0</moshi.version>