add @escaping, swift version file

Author: phimage

.swift-version

@@ -0,0 +1 @@
+3.0

Sources/CallbackURLKit.swift

@@ -54,7 +54,7 @@ public func perform(action: Action, urlScheme: String, parameters: Parameters =
     try Manager.perform(action: action, urlScheme: urlScheme, parameters: parameters, onSuccess: onSuccess, onFailure: onFailure, onCancel: onCancel)
 }
 
-public func register(action: Action, actionHandler: ActionHandler) {
+public func register(action: Action, actionHandler: @escaping ActionHandler) {
     Manager.shared[action] = actionHandler
 }
 

Sources/Client.swift

@@ -71,7 +71,7 @@ open class Client {
     }
 
     // Return an error according to url, could be changed to fulfiled your need
-    open func error(forCode code: String?, message: String?) -> FailureCallbackError {
+    open func error(code: String?, message: String?) -> FailureCallbackError {
         let codeInt: Int
         if let c = code, let ci = Int(c)  {
             codeInt = ci

Sources/Manager.swift

@@ -79,7 +79,7 @@ open class Manager {
                     case .success:
                         request.successCallback?(actionParameters)
                     case .error:
-                        request.failureCallback?(request.client.error(forCode: parameters[kXCUErrorCode], message: parameters[kXCUErrorMessage]))
+                        request.failureCallback?(request.client.error(code: parameters[kXCUErrorCode], message: parameters[kXCUErrorMessage]))
                     case .cancel:
                         request.cancelCallback?()
                     }