Update PMD to 6.30.0

Author: adangel

pom.xml

@@ -21,7 +21,7 @@
 
     <tycho.version>1.7.0</tycho.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <pmd.version>6.30.0-SNAPSHOT</pmd.version>
+    <pmd.version>6.30.0</pmd.version>
     <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
     <pmd.build-tools.version>6</pmd.build-tools.version>
     <checkstyle.version>8.30</checkstyle.version>