[promotion] SuperBuilder promoted to main package.

test/transform/resource/before/SuperBuilderExperimental.java

@@ -0,0 +1,18 @@
+import java.util.List;
+
+public class SuperBuilderExperimental {
+	@lombok.experimental.SuperBuilder
+	public static class Parent {
+		int field1;
+		@lombok.Singular List<String> items;
+	}
+	
+	@lombok.experimental.SuperBuilder
+	public static class Child extends SuperBuilderExperimental.Parent {
+		double field3;
+	}
+	
+	public static void test() {
+		Child x = Child.builder().field3(0.0).field1(5).item("").build();
+	}
+}