Bump jackson-bom from 2.9.6 to 2.9.7 (#90)

Bumps [jackson-bom](https://github.com/FasterXML/jackson-bom) from 2.9.6 to 2.9.7.
- [Release notes](https://github.com/FasterXML/jackson-bom/releases)
- [Commits](FasterXML/jackson-bom@jackson-bom-2.9.6...jackson-bom-2.9.7)

Signed-off-by: dependabot[bot] <support@dependabot.com>

pom.xml

@@ -80,7 +80,7 @@
         <project.moduleName>${project.groupId}.${project.artifactId}</project.moduleName>
         <root.basedir>${project.basedir}</root.basedir>
 
-        <jackson2.version>2.9.6</jackson2.version>
+        <jackson2.version>2.9.7</jackson2.version>
 
         <junit.version>4.12</junit.version>
         <hamcrest.version>1.3</hamcrest.version>