Issue #351: update to CS 8.39

Author: muhlba91

README.md

@@ -21,6 +21,7 @@ Compatibility matrix from checkstyle team:
 
 Checkstyle Plugin|Sonar min|Sonar max|Checkstyle|Jdk
 -----------------|---------|---------|----------|---
+8.39|7.9  |7.9+|8.39|1.8
 8.38|7.9  |7.9+|8.38|1.8
 8.37|7.9  |7.9+|8.37|1.8
 8.35|7.9  |7.9+|8.35|1.8

pom.xml

@@ -93,7 +93,7 @@
   </ciManagement>
 
   <properties>
-    <checkstyle.version>8.38</checkstyle.version>
+    <checkstyle.version>8.39</checkstyle.version>
     <sonar.version>7.9</sonar.version>
     <sonar-java.version>6.0.0.20538</sonar-java.version>
     <maven.checkstyle.plugin.version>3.1.1</maven.checkstyle.plugin.version>

src/test/java/org/sonar/plugins/checkstyle/CheckstyleRulesDefinitionTest.java

@@ -80,7 +80,7 @@ public void test() {
         // such number should not change during checkstyle version upgrade
         assertThat(duplicatedRuleWithTemplate).hasSize(174);
         // all new Rules should fall in this group
-        assertThat(rulesWithDuplicateTemplate).hasSize(7);
+        assertThat(rulesWithDuplicateTemplate).hasSize(8);
 
         for (RulesDefinition.Rule rule : rules) {
             assertThat(rule.key()).isNotNull();