fix can go back hydration (#4209)

packages/web/src/lib.rs

@@ -30,6 +30,8 @@ mod history;
 pub use document::WebDocument;
 #[cfg(feature = "file_engine")]
 pub use file_engine::*;
+#[cfg(feature = "document")]
+pub use history::WebHistory;
 
 #[cfg(all(feature = "devtools", debug_assertions))]
 mod devtools;