mixin-maven-plugin breaks with maven 4.0-alpha

[spachore]

Hello,

mixin-maven-plugin breaks with apache maven 3.9 and 4.0-alpha. This issue could be resolved by adding plexus-utils dependency in the plugin.

The error during build of mixin-example is:

Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/plexus/util/StringUtils
        at com.github.odavid.maven.plugins.MixinModelCache.checkMixinVersion(MixinModelCache.java:96)
        at com.github.odavid.maven.plugins.MixinModelCache.getModel(MixinModelCache.java:46)
        at com.github.odavid.maven.plugins.MixinsProjectLoader.fillMixins(MixinsProjectLoader.java:231)
        at com.github.odavid.maven.plugins.MixinsProjectLoader.mergeMixins(MixinsProjectLoader.java:90)
        at com.github.odavid.maven.plugins.MixinMavenLifecycleParticipant.afterProjectsRead(MixinMavenLifecycleParticipant.java:72)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:221)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:171)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:99)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:820)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:269)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:191)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
Caused by: java.lang.ClassNotFoundException: org.codehaus.plexus.util.StringUtils
        at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
        at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
        ... 19 more