Update chagelog

Author: Luc Dion

CHANGELOG.md

@@ -7,6 +7,15 @@
 
 # Change Log
 
+## [1.8.0](https://github.com/layoutBox/PinLayout/releases/tag/1.8.0)
+Released on 2018-08-23
+
+#### PinLayout Swift 3 support
+PinLayout supports Swift 3 and Swift 4
+
+* Added by [Luc Dion](https://github.com/lucdion) in Pull Request [#169](https://github.com/layoutBox/PinLayout/pull/169) 
+
+
 ## [1.8.0](https://github.com/layoutBox/PinLayout/releases/tag/1.8.0)
 Released on 2018-08-21