Update API for beta 4 of API

Sources/SwiftDux/UI/DispatcherContext.swift

@@ -5,9 +5,9 @@ import Combine
 ///
 /// Typically you should use the `Store<_>.connect(updateOn:wrapper:)` method.
 public class DispatcherContext : BindableObject {
-  public var didChange = PassthroughSubject<Void, Never>()
+  public var willChange = PassthroughSubject<Void, Never>()
   var dispatcher: ActionDispatcher {
-    didSet { didChange.send() }
+    willSet { willChange.send() }
   }
 
   init(dispatcher: ActionDispatcher) {

Sources/SwiftDux/UI/Extensions/View+AppearanceEvents.swift

@@ -9,16 +9,16 @@ extension View {
   /// This includes changes to the application state from dispatched actions. This method
   /// allows actions to be dispatched when the view appears.
   /// - Parameter perform: The action to run asynchronously
-  public func onAppearAsync(perform: @escaping () -> ()) -> Self.Modified<_AppearanceActionModifier> {
+  public func onAppearAsync(perform: @escaping () -> ()) -> some View {
     return self.onAppear {
       DispatchQueue.main.async(execute: perform)
     }
   }
 
   /// Performs an action asynchronously on the main thread when a view appears.
   /// - Parameter perform: The action to run asynchronously
-  public func onDisappearAsync(perform: @escaping () -> ()) -> Self.Modified<_AppearanceActionModifier> {
-    return self.onDisappear() {
+  public func onDisappearAsync(perform: @escaping () -> ()) -> some View {
+    return self.onDisappear {
       DispatchQueue.main.async(execute: perform)
     }
   }

Sources/SwiftDux/UI/StateContext.swift

@@ -3,7 +3,7 @@ import Combine
 import SwiftUI
 
 internal class StateContext<State> : BindableObject where State : StateType {
-  var didChange = PassthroughSubject<Action, Never>()
+  var willChange = PassthroughSubject<Action, Never>()
 
   var filter: (Action) -> Bool
 
@@ -18,7 +18,7 @@ internal class StateContext<State> : BindableObject where State : StateType {
       guard oldValue !== store else { return }
       guard let store = store else { return }
       let didChangePublisher = store.didChange.filter(filter)
-      cancellable = didChangePublisher.subscribe(didChange)
+      cancellable = didChangePublisher.subscribe(willChange)
     }
   }
 

Sources/SwiftDux/UI/StoreContext.swift

@@ -2,7 +2,7 @@ import SwiftUI
 import Combine
 
 public class StoreContext<State> : BindableObject where State : StateType {
-  public var didChange = Publishers.Empty<Void, Never>()
+  public var willChange = Empty<Void, Never>()
   public var store: Store<State>
 
   init(store: Store<State>) {