Update to Swift 4.0

.swift-version

@@ -0,0 +1 @@
+4.0

CHANGELOG.md

@@ -1,5 +1,9 @@
 # KeychainSwift version history
 
+## 9.0.0 (2017-09-23)
+
+Update to Swift 4.0.
+
 ## 8.0.3 (2017-04-08)
 
 Fixed Package Manager setup ([maxkramerbcgdv](https://github.com/maxkramerbcgdv)).

KeychainSwift.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name        = "KeychainSwift"
-  s.version     = "8.0.2"
+  s.version     = "9.0.0"
   s.license     = { :type => "MIT" }
   s.homepage    = "https://github.com/marketplacer/keychain-swift"
   s.summary     = "A library for saving text and data in the Keychain with Swift."