Update swipe_to.dart

[AnkitFlutterDev]

Fixed the issue of https://github.com/Purvik/SwipeTo/issues/28

✅ Why This Works • RawGestureDetector gives us fine-grained control over gesture recognition. • It avoids blocking vertical scrolls while still detecting deliberate horizontal drags. • Flutter’s gesture arena can now disambiguate vertical vs. horizontal gestures correctly.