Create README.md

CNKCQ · web-flow · commit 6c66189dd864 · 2017-06-09T23:11:15.000+08:00
diff --git a/README.md b/README.md
@@ -81,4 +81,4 @@ class ViewController: UIViewController {
 }
 
   ```
-   :key: Basics  Swift 2.2、Swift 3.0
+   :key: Basics  Swift 2.2、Swift 3.0、Swift4.0

Original file line number	Diff line number	Diff line change
`@@ -81,4 +81,4 @@ class ViewController: UIViewController {`
`81`	`81`	`}`
`82`	`82`
`83`	`83`	```
`84`		`- :key: Basics Swift 2.2、Swift 3.0`
	`84`	`+ :key: Basics Swift 2.2、Swift 3.0、Swift4.0`