add comment why we can't update
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
- <version>3.0.0-M3</version>
+ <version>3.0.0-M3</version> <!-- can't update to 3.0.0, see MENFORCER-393 -->
<executions>
<execution>
<id>enforce-maven</id>
