KNOX-2449 - Upgrade jna to 5.6.0

Signed-off-by: Kevin Risden <krisden@apache.org>
diff --git a/pom.xml b/pom.xml
index 3384e30..bc1c1a6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -223,7 +223,7 @@
         <jersey.version>2.6</jersey.version>
         <jetty.version>9.4.30.v20200611</jetty.version>
         <jline.version>2.14.6</jline.version>
-        <jna.version>5.5.0</jna.version>
+        <jna.version>5.6.0</jna.version>
         <joda-time.version>2.10.6</joda-time.version>
         <json-path.version>2.4.0</json-path.version>
         <json-smart.version>2.3</json-smart.version>