Merge pull request #233 from xdev-software/renovate/checkstyleversion

Update checkstyleVersion to v13.4.0

Author: AB-xdev

build.gradle

@@ -7,7 +7,7 @@ plugins {
 }
 
 ext {
-    checkstyleVersion = '13.3.0'
+    checkstyleVersion = '13.4.0'
 
     pmdVersion = '7.22.0'
 }