checkstyle dropped java8 support

Author: sergiitk

build.gradle

@@ -162,7 +162,8 @@ subprojects {
 
     checkstyle {
         configDirectory = file("$rootDir/buildscripts")
-        toolVersion = libs.checkstyle.get().version
+        toolVersion = JavaVersion.current().isJava11Compatible() ? libs.checkstyle.get().version : libs.checkstylejava8.get().version 
+
         ignoreFailures = false
         if (rootProject.hasProperty("checkstyle.ignoreFailures")) {
             ignoreFailures = rootProject.properties["checkstyle.ignoreFailures"].toBoolean()

gradle/libs.versions.toml

@@ -26,6 +26,7 @@ animalsniffer-annotations = "org.codehaus.mojo:animal-sniffer-annotations:1.23"
 auto-value = "com.google.auto.value:auto-value:1.10.2"
 auto-value-annotations = "com.google.auto.value:auto-value-annotations:1.10.2"
 checkstyle = "com.puppycrawl.tools:checkstyle:10.12.1"
+checkstylejava8 = "com.puppycrawl.tools:checkstyle:9.3"
 commons-math3 = "org.apache.commons:commons-math3:3.6.1"
 conscrypt = "org.conscrypt:conscrypt-openjdk-uber:2.5.2"
 cronet-api = "org.chromium.net:cronet-api:108.5359.79"