Bump Sonar plugin version

Author: rammrain

sonarcloud.gradle

@@ -1,6 +1,15 @@
-plugins {
-    id "org.sonarqube" version "6.2.0.5505"
+buildscript {
+    repositories {
+        mavenCentral()
+        maven {
+            url = uri("https://plugins.gradle.org/m2/")
+        }
+    }
+    dependencies {
+        classpath("org.sonarsource.scanner.gradle:sonarqube-gradle-plugin:6.2.0.5505")
+    }
 }
+apply plugin: org.sonarqube.gradle.SonarQubePlugin
 
 sonarqube {
     properties {