chore(deps): update plugin org.sonarqube to v6 (spotbugs#3199)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-  id "org.sonarqube" version "5.1.0.4882"
+  id "org.sonarqube" version "6.0.0.5145"
   id "org.gradle.crypto.checksum" version "1.4.0"
   id "com.github.spotbugs" version "6.0.26"
   id "io.github.gradle-nexus.publish-plugin" version "2.0.0"