small tweaks

Author: nuclearace

Source/SocketAnyEvent.swift

@@ -24,8 +24,8 @@
 
 import Foundation
 
-@objc public final class SocketAnyEvent: NSObject {
-    public let event: String!
+public final class SocketAnyEvent: NSObject {
+    public let event: String
     public let items: NSArray?
     override public var description: String {
         return "SocketAnyEvent: Event: \(event) items: \(items ?? nil)"

Source/SocketIOClient.swift

@@ -134,7 +134,7 @@ public final class SocketIOClient: NSObject, SocketEngineClient, SocketParsable
         reconnectTimer = nil
     }
 
-    @available(*, deprecated=6.0)
+    @available(*, deprecated=5.3)
     public func close() {
         disconnect()
     }
@@ -433,7 +433,7 @@ public final class SocketIOClient: NSObject, SocketEngineClient, SocketParsable
     /**
      Same as connect
      */
-    @available(*, deprecated=6.0)
+    @available(*, deprecated=5.3)
     public func open() {
         connect()
     }