Bump maven-enforcer-plugin to 3.4.1

https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12317520&version=12353576

JIRA: LIGHTY-263
Signed-off-by: tobias.pobocik <tobias.pobocik@pantheon.tech>

Author: Tobianas

lighty-core/lighty-minimal-parent/pom.xml

@@ -48,7 +48,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>3.4.0</version>
+                <version>3.4.1</version>
                 <executions>
                     <execution>
                         <id>enforce-maven</id>