fix(deps): update dependency net.sourceforge.pmd:pmd-java to v7.21.0

Author: renovate[bot]

qulice-pmd/pom.xml

@@ -66,7 +66,7 @@
     <dependency>
       <groupId>net.sourceforge.pmd</groupId>
       <artifactId>pmd-java</artifactId>
-      <version>7.20.0</version>
+      <version>7.21.0</version>
     </dependency>
     <dependency>
       <groupId>org.hamcrest</groupId>