Prepare 4.x branch.

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

README.md

@@ -3,12 +3,12 @@ Messages Component for Laravel and Orchestra Platform
 
 Messages Component bring a unified notification support for Laravel and Orchestra Platform.
 
-[![Build Status](https://travis-ci.org/orchestral/messages.svg?branch=master)](https://travis-ci.org/orchestral/messages)
+[![Build Status](https://travis-ci.org/orchestral/messages.svg?branch=^4.x)](https://travis-ci.org/orchestral/messages)
 [![Latest Stable Version](https://poser.pugx.org/orchestra/messages/version)](https://packagist.org/packages/orchestra/messages)
 [![Total Downloads](https://poser.pugx.org/orchestra/messages/downloads)](https://packagist.org/packages/orchestra/messages)
 [![Latest Unstable Version](https://poser.pugx.org/orchestra/messages/v/unstable)](//packagist.org/packages/orchestra/messages)
 [![License](https://poser.pugx.org/orchestra/messages/license)](https://packagist.org/packages/orchestra/messages)
-[![Coverage Status](https://coveralls.io/repos/github/orchestral/messages/badge.svg?branch=master)](https://coveralls.io/github/orchestral/messages?branch=master)
+[![Coverage Status](https://coveralls.io/repos/github/orchestral/messages/badge.svg?branch=^4.x)](https://coveralls.io/github/orchestral/messages?branch=^4.x)
 
 ## Table of Content
 

composer.json

@@ -35,7 +35,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "4.0-dev"
+            "dev-master": "5.0-dev"
         }
     },
     "config": {