Update Alamofire to 4.2.0 with new version of Xcode 8.1

Pods/Alamofire/Source/AFError.swift

@@ -132,6 +132,16 @@ public enum AFError: Error {
     case responseSerializationFailed(reason: ResponseSerializationFailureReason)
 }
 
+// MARK: - Adapt Error
+
+struct AdaptError: Error {
+    let error: Error
+}
+
+extension Error {
+    var underlyingAdaptError: Error? { return (self as? AdaptError)?.error }
+}
+
 // MARK: - Error Booleans
 
 extension AFError {