[maven-release-plugin] prepare release v4.8.0

pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>edu.hm.hafner</groupId>
   <artifactId>codingstyle</artifactId>
-  <version>4.8.0-SNAPSHOT</version>
+  <version>4.8.0</version>
   <packaging>jar</packaging>
 
   <name>Java coding style</name>
@@ -39,7 +39,7 @@
   <scm>
     <connection>scm:git:https://github.com/uhafner/codingstyle.git</connection>
     <developerConnection>scm:git:[email protected]:uhafner/codingstyle.git</developerConnection>
-    <tag>HEAD</tag>
+    <tag>v4.8.0</tag>
     <url>https://github.com/uhafner/codingstyle</url>
   </scm>
   <distributionManagement>
@@ -719,7 +719,7 @@
               <includeTestSourceDirectory>true</includeTestSourceDirectory>
               <configLocation>etc/checkstyle-tests-configuration.xml</configLocation>
               <outputFile>${project.build.directory}/checkstyle-tests/checkstyle-result.xml</outputFile>
-              <sourceDirectories></sourceDirectories>
+              <sourceDirectories />
             </configuration>
           </execution>
         </executions>