Replace val with native final var in Java >= 10

test/transform/resource/after-delombok/ValSwitchExpression.java

@@ -1,9 +1,9 @@
 // version 14:
 public class ValSwitchExpression {
 	public void method(int arg) {
-		final int x = switch (arg) {
+		final var x = switch (arg) {
 			default -> {
-				final java.lang.String s = "string";
+				final var s = "string";
 				yield arg;
 			}
 		};