NPE in DefaultArtifactInstaller.install - missing injection of RepositoryManager

Add missing @Requirement annotation

@Requirement
private RepositoryManager repositoryManager;

Caused by: org.apache.maven.plugin.MojoExecutionException: Failed to install artifact: org.apache.maven.plugins:maven-plugins:pom:34
at org.apache.maven.plugins.invoker.InstallMojo.installArtifact (InstallMojo.java:264)
at org.apache.maven.plugins.invoker.InstallMojo.installProjectPom (InstallMojo.java:410)
at org.apache.maven.plugins.invoker.InstallMojo.installProjectParents (InstallMojo.java:379)
at org.apache.maven.plugins.invoker.InstallMojo.execute (InstallMojo.java:199)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:136)

Caused by: java.lang.NullPointerException
at org.apache.maven.shared.transfer.artifact.install.internal.DefaultArtifactInstaller.install (DefaultArtifactInstaller.java:81)
at org.apache.maven.plugins.invoker.InstallMojo.installArtifact (InstallMojo.java:254)
at org.apache.maven.plugins.invoker.InstallMojo.installProjectPom (InstallMojo.java:410)
at org.apache.maven.plugins.invoker.InstallMojo.installProjectParents (InstallMojo.java:379)
at org.apache.maven.plugins.invoker.InstallMojo.execute (InstallMojo.java:199)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:136)