fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMFASTERXMLJACKSONCORE-10332631

Author: snyk-bot

pom.xml

@@ -10,7 +10,7 @@
         <dependency>
             <groupId>io.javalin</groupId>
             <artifactId>javalin-bundle</artifactId>
-            <version>3.13.12</version>
+            <version>5.0.0</version>
         </dependency>
     </dependencies>