Merge pull request #65 from SwiftyJSON/readme

Update README.md

Author: wongzigii

README.md

@@ -2,19 +2,33 @@
 
 An extension to make serializing [Alamofire](https://github.com/Alamofire/Alamofire)'s response with [SwiftyJSON](https://github.com/SwiftyJSON/SwiftyJSON) easily.
 
+⚠️ **To use with Swift 3.x please ensure you are using >= `2.0.0`** ⚠️
+
+⚠️ **To use with Swift 4.x please ensure you are using >= `3.0.0`** ⚠️
+
+## Swift version
+
+Alamofire-SwiftyJSON | Swift version | Alamofire | SwiftyJSON
+-------------        | --------------| ----------| ----------
+2.x                  | Swift 3.x     |    4.x    |  3.x
+3.x                  | Swift 4.x     |    4.5.x  |  4.x
+
 ## Requirements
 
 - iOS 8.0+ / Mac OS X 10.9+
-- Xcode 8.0
+- Xcode 8.0+
+- Swift 3.0+
 
 ## Install
 
-CocoaPods:
+[CocoaPods](https://cocoapods.org/):
+
 ```ruby
 pod 'Alamofire-SwiftyJSON'
 ```
 
-Carthage:
+[Carthage](https://github.com/Carthage/Carthage):
+
 ```
 github "SwiftyJSON/Alamofire-SwiftyJSON" "master"
 ```