Merge pull request #272 from hmcts/renovate/checkstyle-10.x

Update dependency checkstyle to v10.16.0

Author: banderous

test-projects/test-library/build.gradle

@@ -19,7 +19,7 @@ repositories {
 }
 
 checkstyle {
-    toolVersion '10.15.0'
+    toolVersion '10.16.0'
 }
 
 dependencies {