Update to Swift 4.0

README.md

@@ -67,7 +67,7 @@ let package = Package(
 
 *Branch:* swift-4.0
 
-* *File:* [KeychainSwiftDistrib.swift](https://github.com/marketplacer/keychain-swift/blob/swift-4.0/Distrib/KeychainSwiftDistrib.swift)
+* *File:* [KeychainSwiftDistrib.swift](https://github.com/marketplacer/keychain-swift/blob/swift-4_0/Distrib/KeychainSwiftDistrib.swift)
 * *Carthage:* `github "marketplacer/keychain-swift" "swift-4.0"`
 * *CocoaPods:* `pod 'KeychainSwift', :git => 'https://github.com/marketplacer/keychain-swift.git', :branch => 'swift-4.0'`