Issue #399: upgrade to checkstyle 9.3

Author: muhlba91

README.md

@@ -21,6 +21,7 @@ Compatibility matrix from checkstyle team:
 
 | Checkstyle Plugin | Sonar min | Sonar max | Checkstyle | Jdk |
 |-------------------|-----------|-----------|------------|-----|
+| 9.3               | 8.9       | 8.9+      | 9.3        | 1.8 |
 | 9.2.1             | 8.9       | 8.9+      | 9.2.1      | 1.8 |
 | 9.2               | 8.9       | 8.9+      | 9.2        | 1.8 |
 | 9.1               | 8.9       | 8.9+      | 9.1        | 1.8 |

pom.xml

@@ -93,7 +93,7 @@
   </ciManagement>
 
   <properties>
-    <checkstyle.version>9.2.1</checkstyle.version>
+    <checkstyle.version>9.3</checkstyle.version>
     <sonar.version>8.9.0.43852</sonar.version>
     <sonar-java.version>7.2.0.26923</sonar-java.version>
     <maven.checkstyle.plugin.version>3.1.2</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(0);
         // all new Rules should fall in this group
-        assertThat(rulesWithDuplicateTemplate).hasSize(184);
+        assertThat(rulesWithDuplicateTemplate).hasSize(185);
 
         for (RulesDefinition.Rule rule : rules) {
             assertThat(rule.key()).isNotNull();