Add more options

src/main/resources/starter/plugins/@kotlin.twig

@@ -19,6 +19,6 @@
         </execution>
     </executions>
     <configuration>
-        <jvmTarget>14</jvmTarget>
+        <jvmTarget>${java.version}</jvmTarget>
     </configuration>
 </plugin>

src/main/resources/starter/pom.twig

@@ -6,8 +6,10 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <maven.compiler.target>14</maven.compiler.target>
-        <maven.compiler.source>14</maven.compiler.source>
+        <java.version>{{ javaVersion }}</java.version>
+        <kotlin.version>{{ kotlinVersion }}</kotlin.version>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <main.class>{{ basePackage }}/{{ name | lower | capitalize }}Kt</main.class>
     </properties>