Merge pull request #89 from xdev-software/renovate/checkstyleversion

Update checkstyleVersion to v10.21.3

Author: AB-xdev

build.gradle

@@ -8,7 +8,7 @@ plugins {
 }
 
 ext {
-    checkstyleVersion = '10.21.2'
+    checkstyleVersion = '10.21.3'
     pmdVersion = '7.10.0'
 }