Raise minimum maven version to 3.8.1

Author: stefanseifert

changes.xml

@@ -26,7 +26,7 @@
 
     <release version="3.2.2" date="not released">
       <action type="update" dev="sseifert" issue="107">
-        Raise minimum maven version to 3.3.9, minimum java build version to Java 17.
+        Raise minimum maven version to 3.8.1, minimum java build version to Java 17.
       </action>
       <action type="update" dev="sseifert">
         Update dependencies.

pom.xml

@@ -84,7 +84,7 @@ under the License.
   <properties>
     <site.url.module.prefix>maven/plugins/eclipse-maven-plugin</site.url.module.prefix>
 
-    <mavenVersion>3.3.9</mavenVersion>
+    <mavenVersion>3.8.1</mavenVersion>
     <maven.test.jvmargs>-Xmx1024m</maven.test.jvmargs>
     <surefire.version>3.5.4</surefire.version>
     <mavenPluginToolsVersion>3.15.2</mavenPluginToolsVersion>