PDFBOX-5660: update enforcer plugin

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1934393 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

parent/pom.xml

@@ -221,7 +221,7 @@
                 </plugin>
                 <plugin>
                     <artifactId>maven-enforcer-plugin</artifactId>
-                    <version>3.6.2</version>
+                    <version>3.6.3</version>
                     <executions>
                         <execution>
                             <goals>