v3.3.4

• Feat: getState().indexByKey(key) looks up an item’s current index by key.
• Feat: anchoredEndSpace now works with standard React Native LegendList, including horizontal and RTL lists, and stays accurate after content measurements change. It supports single-column lists only.
• Fix: maintainScrollAtEnd continues following content growth unless the user scrolls away.
• Fix: Changing dataKey no longer briefly displays stale rows from the previous dataset.
• Fix: Initial scrolling and scrollToIndex correctly account for padding, direction, and final-item gaps.
• Fix: Web content-container sizing remains correct when callers provide padding or content-box styles.
• Fix: useRecyclingEffect and useRecyclingState no longer crash outside a LegendList. #498
• Fix: Programmatic scrolls settle reliably when superseded, already aligned on iOS, or interrupted by unmounting. #508