feat: Dismiss iOS keyboard (#63)

* build: Capture overlooked lock file changes

These lock files changes originate from an earlier dependency addition.

* feat: Allow dismissing the iOS virtual keyboard

iOS apps generally allow dismissing the virtual keyboard through swiping
downward in a scroll view. Enabling this in the editor improves the
reading experience, allowing users to view their content without the
keyboard occupying a large portion of the screen.

ios/Sources/GutenbergKit/Sources/EditorViewController.swift

@@ -72,6 +72,7 @@ public final class EditorViewController: UIViewController, GutenbergEditorContro
         config.selectionGranularity = .character
 
         self.webView = GBWebView(frame: .zero, configuration: config)
+        self.webView.scrollView.keyboardDismissMode = .interactive
 
         super.init(nibName: nil, bundle: nil)
     }