Upgrade jackson.version as prompted by dependabot. (#72)

Author: JeffInChrist

pom.xml

@@ -13,7 +13,7 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
-    <jackson.version>2.9.9</jackson.version>
+    <jackson.version>2.9.10.7</jackson.version>
     <apache.commons-lang.version>3.8.1</apache.commons-lang.version>
     <apache.commons-collections.version>4.2</apache.commons-collections.version>
     <apache.commons-io.version>2.7</apache.commons-io.version>