Update README.md

Author: s4cha

README.md

@@ -139,5 +139,5 @@ github "s4cha/Plug"
 ## Swift Version
 Swift 3 -> version **0.2.0**  
 Swift 4 -> version **0.3.0**
-Swift 4.2 -> version **1.0.0**
+Swift 4.2 -> version **1.0.0**  
 Swift 5.0 -> version **1.1.0**