Use official Homebrew Cask tap

Author: vladimyr

README.md

@@ -65,8 +65,7 @@ Unzip, drag the app to Applications, and then run it.
 If you wish to install the application from Homebrew:
 
 ```
-$ brew tap dteoh/devdocs
-$ brew cask install devdocs-macos
+$ brew cask install dteoh-devdocs
 ```
 
 The application will live at `/Applications/DevDocs.app`.