JAVA-5926: Fix core-java-jpms setup (#10930)

Co-authored-by: Krzysztof Woyke <krzysztof.woyke.sp@lhsystems.com>

core-java-modules/core-java-jpms/decoupling-pattern1/consumermodule1/pom.xml

@@ -10,7 +10,7 @@
     <parent>
         <groupId>com.baeldung.decoupling-pattern1</groupId>
         <artifactId>decoupling-pattern1</artifactId>
-        <version>1.0</version>
+        <version>1.0-SNAPSHOT</version>
     </parent>
 
     <dependencies>
@@ -26,6 +26,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
+                </configuration>
             </plugin>
         </plugins>
     </build>