Merge pull request #177 from xdev-software/renovate/major-checkstyleversion

Update checkstyleVersion to v12 (major)

Author: AB-xdev

build.gradle

@@ -7,7 +7,7 @@ plugins {
 }
 
 ext {
-    checkstyleVersion = '11.1.0'
+    checkstyleVersion = '12.0.0'
 
     pmdVersion = '7.17.0'
 }