Skipping report-aggregate does not work

Start at org.pitest.maven.report.AbstractPitAggregationReportMojo#executeReport and inspect how the skip property is handled compared with PitReportMojo. Done means the report-aggregate goal does not run when the configured skip value is true, while still running when it is false.

I am aggregating reports by using report-aggregate goal of pitest-1.6.8.
By default, I don't want to run the aggregation. So I defined a property which value is true in order to change it by mvn -D parameter and passing the property value using a variable to the configuration named 'skip' of pitest-maven.
I'm expecting that the report-aggregate will not run while not passing the corresponding -D parameter to mvn. But it fails. The report-aggregate is still running.

By reading the source code, I found that AbstractPitAggregationReportMojo ignores the skip property of PitReportMojo totally. Can we just check skip property in org.pitest.maven.report.AbstractPitAggregationReportMojo#executeReport function in order to use the skip configuration to skip the report-aggregate goal?

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  
    <properties>
        <pitest.skip>true</pitest.skip>
    </properties>

    <!-- other things such as parent and dependencies ... -->

    <build>
        <plugins>
            <plugin>
                <groupId>org.pitest</groupId>
                <artifactId>pitest-maven</artifactId>
                <version>1.6.8</version>
                <configuration>
                    <failWhenNoMutations>false</failWhenNoMutations>
                    <exportLineCoverage>true</exportLineCoverage>
                    <outputFormats><outputFormat>XML</outputFormat><outputFormat>HTML</outputFormat></outputFormats>
                    <timestampedReports>false</timestampedReports>
                    <skip>${pitest.skip}</skip>  <!-- Expecting skip report-aggregate goal -->
                </configuration>
                <executions>
                    <execution>
                        <id>report</id>
                        <goals>
                            <goal>report-aggregate</goal>
                        </goals>
                    </execution>
              </executions>
            </plugin>
        </plugins>
    </build>
</project>