Switch to (temporarily) use main branch of ably-cocoa

This allows us to make use of the Swift concurrency enhancements that
have been added on `main`, and to identify any further concurrency
enhancements that still need to be made (in response to any new
concurrency errors that we get as we continue to develop the Chat SDK).

AblyChat.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -1,13 +1,13 @@
 {
-  "originHash" : "fcc346d6fe86e610ac200cdbbf91c56204df67286546d5079bd9c610ee65953b",
+  "originHash" : "6a8d15fb1d326ac6e8a40c286c152332146d6f58c73123cb8083f68d483dd728",
   "pins" : [
     {
       "identity" : "ably-cocoa",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/ably/ably-cocoa",
       "state" : {
-        "revision" : "7f639c609e50053abd4590f34333f9472645558a",
-        "version" : "1.2.33"
+        "branch" : "main",
+        "revision" : "ccca241a8a7f08b22a93802161460c843d9b5bf3"
       }
     },
     {

Example/AblyChatExample/Mocks/MockRealtime.swift

@@ -3,6 +3,10 @@ import AblyChat
 
 /// A mock implementation of `RealtimeClientProtocol`. It only exists so that we can construct an instance of `DefaultChatClient` without needing to create a proper `ARTRealtime` instance (which we can’t yet do because we don’t have a method for inserting an API key into the example app). TODO remove this once we start building the example app
 final class MockRealtime: NSObject, RealtimeClientProtocol, Sendable {
+    func request(_: String, path _: String, params _: [String: String]?, body _: Any?, headers _: [String: String]?, callback _: @escaping ARTHTTPPaginatedCallback) throws {
+        fatalError("Not implemented")
+    }
+
     var device: ARTLocalDevice {
         fatalError("Not implemented")
     }
@@ -32,6 +36,10 @@ final class MockRealtime: NSObject, RealtimeClientProtocol, Sendable {
     }
 
     final class Channel: RealtimeChannelProtocol {
+        var properties: ARTChannelProperties {
+            fatalError("Not implemented")
+        }
+
         var state: ARTRealtimeChannelState {
             fatalError("Not implemented")
         }

Package.resolved

@@ -1,13 +1,13 @@
 {
-  "originHash" : "fcc346d6fe86e610ac200cdbbf91c56204df67286546d5079bd9c610ee65953b",
+  "originHash" : "db24f2979451a46f504f45d35893eb8501f27488ae70e1412340139a0e7551e2",
   "pins" : [
     {
       "identity" : "ably-cocoa",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/ably/ably-cocoa",
       "state" : {
-        "revision" : "7f639c609e50053abd4590f34333f9472645558a",
-        "version" : "1.2.33"
+        "branch" : "main",
+        "revision" : "ccca241a8a7f08b22a93802161460c843d9b5bf3"
       }
     },
     {

Package.swift

@@ -20,7 +20,8 @@ let package = Package(
     dependencies: [
         .package(
             url: "https://github.com/ably/ably-cocoa",
-            from: "1.2.0"
+            // TODO: Switch back to using a tag (https://github.com/ably-labs/ably-chat-swift/issues/80)
+            branch: "main"
         ),
         .package(
             url: "https://github.com/apple/swift-argument-parser",

Sources/AblyChat/AblyCocoaExtensions/Ably+Dependencies.swift

@@ -1,10 +1,7 @@
 import Ably
 
-// TODO: remove "@unchecked Sendable" once https://github.com/ably/ably-cocoa/issues/1962 done
+extension ARTRealtime: RealtimeClientProtocol {}
 
-// This @retroactive is needed to silence the Swift 6 compiler error "extension declares a conformance of imported type 'ARTRealtimeChannels' to imported protocol 'Sendable'; this will not behave correctly if the owners of 'Ably' introduce this conformance in the future (…) add '@retroactive' to silence this warning". I don’t fully understand the implications of this but don’t really mind since both libraries are in our control.
-extension ARTRealtime: RealtimeClientProtocol, @retroactive @unchecked Sendable {}
+extension ARTRealtimeChannels: RealtimeChannelsProtocol {}
 
-extension ARTRealtimeChannels: RealtimeChannelsProtocol, @retroactive @unchecked Sendable {}
-
-extension ARTRealtimeChannel: RealtimeChannelProtocol, @retroactive @unchecked Sendable {}
+extension ARTRealtimeChannel: RealtimeChannelProtocol {}