Update readme

Author: nuclearace

Diff for: README.md

@@ -142,7 +142,7 @@ Run `seed install`.
 ##API
 Constructors
 -----------
-`init(var socketURL: NSURL, config: SocketIOClientConfiguration = [])` - Creates a new SocketIOClient. options is a Set of SocketIOClientOption. If your socket.io server is secure, you need to specify `https` in your socketURL.
+`init(var socketURL: NSURL, config: SocketIOClientConfiguration = [])` - Creates a new SocketIOClient. If your socket.io server is secure, you need to specify `https` in your socketURL.
 
 `convenience init(socketURL: NSURL, options: NSDictionary?)` - Same as above, but meant for Objective-C. See Options on how convert between SocketIOClientOptions and dictionary keys.