Update README.md

ysoftware · web-flow · commit 1cbe7a01e633 · 2019-03-26T10:47:42.000+03:00
diff --git a/README.md b/README.md
@@ -1,5 +1,5 @@
 # append(attributedString, with: ease)
-Swift 4.2
+Swift 5
 
 #### An extension that adds a way for easier work with NSMutableAttributedString.
 
