fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-174736

Author: snyk-bot

pom.xml

@@ -90,7 +90,7 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.9.8</version>
+            <version>2.9.9</version>
         </dependency>
         <dependency>
 		    <groupId>com.googlecode.json-simple</groupId>