Security upgrade (see FasterXML/jackson-databind#2186)

Author: holograph

pom.xml

@@ -40,7 +40,7 @@
         <compileSource>1.6</compileSource>
         <testCompileSource>1.8</testCompileSource>
 
-        <jackson.version>2.9.7</jackson.version>
+        <jackson.version>2.9.8</jackson.version>
         <junit.version>5.3.1</junit.version>
     </properties>
 
@@ -184,4 +184,4 @@
             <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
         </repository>
     </distributionManagement>
-</project>
+</project>