minor: Bump project version to 10.15.0

Author: github-actions[bot]

eclipsecs-sevntu-plugin/pom.xml

@@ -28,7 +28,7 @@
   <properties>
     <eclipsecs.version>10.4.0-SNAPSHOT</eclipsecs.version>
     <!-- verify time version -->
-    <checkstyle.version>10.14.2</checkstyle.version>
+    <checkstyle.version>10.15.0</checkstyle.version>
     <checkstyle.configLocation>https://raw.githubusercontent.com/checkstyle/checkstyle/checkstyle-${checkstyle.version}/config/checkstyle-checks.xml</checkstyle.configLocation>
     <checkstyle.header>https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java.header</checkstyle.header>
     <checkstyle.regexp.header>https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java-regexp.header</checkstyle.regexp.header>

sevntu-checks/pom.xml

@@ -18,7 +18,7 @@
     <!-- It is compile dependency to checkstyle, this version has to be the same as eclipse-cs depends on -->
     <checkstyle.eclipse-cs.version>10.4</checkstyle.eclipse-cs.version>
     <!-- verify time version -->
-    <checkstyle.version>10.14.2</checkstyle.version>
+    <checkstyle.version>10.15.0</checkstyle.version>
     <checkstyle.configLocation>https://raw.githubusercontent.com/checkstyle/checkstyle/checkstyle-${checkstyle.version}/config/checkstyle-checks.xml</checkstyle.configLocation>
     <checkstyle.nonMain.configLocation>https://raw.githubusercontent.com/checkstyle/checkstyle/checkstyle-${checkstyle.version}/config/checkstyle-non-main-files-checks.xml</checkstyle.nonMain.configLocation>
     <checkstyle.non-main-files-suppressions.file>config/checkstyle-non-main-files-suppressions.xml</checkstyle.non-main-files-suppressions.file>

sevntu-checkstyle-sonar-plugin/pom.xml

@@ -26,7 +26,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <checkstyle.version>10.14.2</checkstyle.version>
+    <checkstyle.version>10.15.0</checkstyle.version>
     <checkstyle.plugin.version>3.3.0</checkstyle.plugin.version>
     <sonar.version>7.9</sonar.version>
     <staxmate.version>2.0.1</staxmate.version>