build(deps): update dependency org.eclipse.jdt:org.eclipse.jdt.core to v3.40.0

src/main/java/spoon/support/compiler/jdt/JDTTreeBuilder.java

@@ -1780,6 +1780,10 @@ public void endVisit(TypePattern anyPattern, BlockScope scope) {
 
 	@Override
 	public boolean visit(SwitchStatement switchStatement, BlockScope scope) {
+		// JDT 3.40.0 removes SwitchExpression#traverse method, so let's emulate it
+		if (switchStatement instanceof SwitchExpression switchExpression) {
+			return visit(switchExpression, scope);
+		}
 		context.enter(factory.Core().createSwitch(), switchStatement);
 		return true;
 	}

src/main/java/spoon/support/compiler/jdt/ParentExiter.java

@@ -503,8 +503,8 @@ public void visitCtBreak(CtBreak b) {
 	@Override
 	public <E> void visitCtCase(CtCase<E> caseStatement) {
 		final ASTNode node = jdtTreeBuilder.getContextBuilder().getCurrentNode();
-		if (node instanceof CaseStatement) {
-			caseStatement.setCaseKind(((CaseStatement) node).isExpr ? CaseKind.ARROW : CaseKind.COLON);
+		if (node instanceof CaseStatement cs) {
+			caseStatement.setCaseKind(cs.isSwitchRule ? CaseKind.ARROW : CaseKind.COLON);
 		}
 		if (shouldAddAsCaseExpression(caseStatement, node)) {
 			if (child instanceof CtPattern pattern) {

src/test/java/spoon/test/reference/ElasticsearchStackoverflowTest.java

@@ -46,7 +46,6 @@ public <T> void visitCtExecutableReference(
 		}
 	}
 
-	@GitHubIssue(issueNumber = 5977, fixed = false)
 	@Test
 	public void testStackOverflow() {
 		Launcher launcher = new Launcher();