Bump org.apache.rat:apache-rat-plugin from 0.15 to 0.16

Bumps org.apache.rat:apache-rat-plugin from 0.15 to 0.16.

---
updated-dependencies:
- dependency-name: org.apache.rat:apache-rat-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 84ff582..9c45344 100644
--- a/pom.xml
+++ b/pom.xml
@@ -84,7 +84,7 @@
     <javaVersion>1.8</javaVersion>
     <httpClientVersion>4.5.14</httpClientVersion>
     <loggerVersion>2.22.1</loggerVersion>
-    <apacheRatVersion>0.15</apacheRatVersion>
+    <apacheRatVersion>0.16</apacheRatVersion>
     <project.build.outputTimestamp>1</project.build.outputTimestamp>
   </properties>
   <distributionManagement>