Move to Java 21

Author: akurtakov

org.eclipse.m2e.tests/.classpath

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21">
 		<attributes>
 			<attribute name="module" value="true"/>
 		</attributes>

org.eclipse.m2e.tests/.settings/org.eclipse.jdt.core.prefs

@@ -28,9 +28,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable.secondary=
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -144,7 +144,7 @@ org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=21
 org.eclipse.jdt.core.compiler.taskCaseSensitive=enabled
 org.eclipse.jdt.core.compiler.taskPriorities=NORMAL,HIGH,HIGH
 org.eclipse.jdt.core.compiler.taskTags=TODO,FIXME,XXX

org.eclipse.m2e.tests/META-INF/MANIFEST.MF

@@ -31,7 +31,7 @@ Require-Bundle: org.eclipse.core.externaltools,
  org.eclipse.m2e.discovery,
  org.mockito.mockito-core
 Bundle-ActivationPolicy: lazy
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Bundle-Vendor: Eclipse.org - m2e
 MavenArtifact-GroupId: org.eclipse.m2e
 MavenArtifact-ArtifactId: org.eclipse.m2e.test