Merge pull request #217 from xdev-software/renovate/pmdversion

Update pmdVersion to v7.21.0

Author: AB-xdev

build.gradle

@@ -9,7 +9,7 @@ plugins {
 ext {
     checkstyleVersion = '13.0.0'
 
-    pmdVersion = '7.20.0'
+    pmdVersion = '7.21.0'
 }
 
 def properties(String key) {