correct the following Jenkins (BuildHive) warning:
[WARNING]
[WARNING] Some problems were encountered while building the effective model for com.github.chrisprice:phonegap-build-maven-plugin:maven-plugin:0.0.5-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ com.github.chrisprice:phonegap-build:0.0.5-SNAPSHOT, /scratch/jenkins/workspace/chrisprice/phonegap-build/pom.xml, line 88, column 12