Fix view controller which’s being dismissed (#28)

Author: mikhailmaslo

Sources/BottomSheet/Core/Extensions/UIViewController+Convenience.swift

@@ -69,7 +69,7 @@ public final class DefaultBottomSheetModalDismissalHandler: BottomSheetModalDism
     }
 
     public func performDismissal(animated: Bool) {
-        if let presentedViewController = presentingViewController {
+        if let presentedViewController = presentingViewController?.presentedViewController {
             presentedViewController.dismiss(animated: animated, completion: dismissCompletion)
         } else {
             // User dismissed view controller by swipe-gesture, dismiss handler wasn't invoked

Sources/BottomSheet/Core/Presentation/BottomSheetPresentationController.swift

@@ -192,7 +192,7 @@ public final class BottomSheetPresentationController: UIPresentationController {
     private func startInteractiveTransition() {
         interactionController = UIPercentDrivenInteractiveTransition()
 
-        presentingViewController.dismiss(animated: true) { [weak self] in
+        presentedViewController.dismiss(animated: true) { [weak self] in
             guard let self = self else { return }
 
             if self.presentingViewController.presentedViewController !== self.presentedViewController {