chore: remove socket as the default transport layer (#179)

Author: elefantel

Sources/metamask-ios-sdk/Classes/CommunicationLayer/CommLayer.swift

@@ -5,8 +5,13 @@
 
 import Foundation
 
+/**
+ An enum representing the communication types supported for communication with MetaMask wallet
+ **/
 public enum Transport: CaseIterable, Identifiable, Hashable {
+    /// Uses socket.io as a transport mechanism
     case socket
+    /// Uses deeplinking as transport mechanism. Recommended. Requires setting URI scheme
     case deeplinking(dappScheme: String)
 
     public var id: String {

Sources/metamask-ios-sdk/Classes/SDK/MetaMaskSDK.swift

@@ -81,7 +81,7 @@ public class MetaMaskSDK: ObservableObject {
     }
 
     public static func shared(_ appMetadata: AppMetadata,
-                              transport: Transport = .socket,
+                              transport: Transport,
                               enableDebug: Bool = true,
                               sdkOptions: SDKOptions?) -> MetaMaskSDK {
         guard let sdk = SDKWrapper.shared.sdk else {