Remove maven-compat, which needed three things rather than one

pom.xml

@@ -57,8 +57,8 @@
 
   <properties>
     <javaVersion>8</javaVersion>
-    <mavenVersion>3.6.3</mavenVersion>
-    <resolverVersion>1.4.1</resolverVersion>
+    <mavenVersion>3.9.12</mavenVersion>
+    <resolverVersion>1.9.25</resolverVersion>
     <slf4jVersion>1.7.36</slf4jVersion>
     <sitePluginVersion>${version.maven-site-plugin}</sitePluginVersion>
     <projectInfoReportsPluginVersion>${version.maven-project-info-reports-plugin}</projectInfoReportsPluginVersion>
@@ -187,12 +187,6 @@
       <version>${mavenVersion}</version>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.apache.maven</groupId>
-      <artifactId>maven-compat</artifactId>
-      <version>${mavenVersion}</version>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
       <artifactId>maven-resolver-provider</artifactId>

src/test/java/org/apache/maven/reporting/exec/TestDefaultMavenReportExecutor.java

@@ -29,10 +29,10 @@
 import org.apache.maven.DefaultMaven;
 import org.apache.maven.Maven;
 import org.apache.maven.RepositoryUtils;
 import org.apache.maven.artifact.repository.ArtifactRepository;
-import org.apache.maven.artifact.repository.ArtifactRepositoryFactory;
 import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;
 import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
+import org.apache.maven.bridge.MavenRepositorySystem;
 import org.apache.maven.cli.MavenCli;
 import org.apache.maven.cli.configuration.SettingsXmlConfigurationProcessor;
 import org.apache.maven.execution.DefaultMavenExecutionRequest;
@@ -95,9 +95,9 @@
         assertEquals(2, mavenReportExecutions.size());
         assertEquals(
                 "testapidocs/index",
                 mavenReportExecutions.get(0).getMavenReport().getOutputName());
         assertEquals(
                 "apidocs/index", mavenReportExecutions.get(1).getMavenReport().getOutputName());
     }
 
     @Test
@@ -114,12 +114,12 @@
         assertNotNull(mavenReportExecutions);
         assertEquals(3, mavenReportExecutions.size());
         assertEquals(
                 "apidocs/index", mavenReportExecutions.get(0).getMavenReport().getOutputName());
         assertEquals(
                 "testapidocs/index",
                 mavenReportExecutions.get(1).getMavenReport().getOutputName());
         assertEquals(
                 "apidocs/index", mavenReportExecutions.get(2).getMavenReport().getOutputName());
     }
 
     @Test
@@ -131,7 +131,7 @@
         Plugin plugin = new Plugin();
         plugin.setGroupId("org.apache.maven.plugins");
         plugin.setArtifactId("maven-javadoc-plugin");
-        plugin.setVersion("3.4.0");
+        plugin.setVersion("3.12.0");
         Dependency dependency = new Dependency();
         dependency.setGroupId("commons-lang");
         dependency.setArtifactId("commons-lang");
@@ -158,7 +158,7 @@
         try {
             MavenReportExecutorRequest mavenReportExecutorRequest = new MavenReportExecutorRequest();
 
             mavenReportExecutorRequest.setLocalRepository(getLocalRepo());
 
             mavenReportExecutorRequest.setProject(mavenProject);
 
@@ -170,7 +170,7 @@
             ReportPlugin reportPlugin = new ReportPlugin();
             reportPlugin.setGroupId("org.apache.maven.plugins");
             reportPlugin.setArtifactId("maven-javadoc-plugin");
-            reportPlugin.setVersion("3.4.0");
+            reportPlugin.setVersion("3.12.0");
 
             for (ReportSet reportSet : javadocReportSets) {
                 reportPlugin.getReportSets().add(reportSet);
@@ -249,7 +249,6 @@
     }
 
     private ArtifactRepository getLocalRepo() throws Exception {
-        ArtifactRepositoryFactory artifactRepositoryFactory = plexusContainer.lookup(ArtifactRepositoryFactory.class);
         ArtifactRepositoryLayout defaultArtifactRepositoryLayout =
                 plexusContainer.lookup(ArtifactRepositoryLayout.class, "default");
         String updatePolicyFlag = ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS;
@@ -260,7 +259,7 @@
                 new ArtifactRepositoryPolicy(true, updatePolicyFlag, checksumPolicyFlag);
         String localRepoPath =
                 System.getProperty("localRepository", MavenCli.USER_MAVEN_CONFIGURATION_HOME.getPath() + "/repository");
-        return artifactRepositoryFactory.createArtifactRepository(
+        return MavenRepositorySystem.createArtifactRepository(
                 "local",
                 Paths.get(localRepoPath).toUri().toASCIIString(),
                 defaultArtifactRepositoryLayout,