Improved travis.ci config

Author: moay

.travis.yml

@@ -2,10 +2,6 @@ language: php
 php:
   - '7.1'
   - '7.2'
-  - 'nightly'
 install:
   - composer install
-script: bin/phpunit
-matrix:
-  allow_failures
-    - php: 'nightly'
+script: bin/phpunit

README.md

@@ -1,4 +1,7 @@
 # symfony-flex-server
+
+[![Build Status](https://travis-ci.org/moay/symfony-flex-server.svg?branch=master)](https://travis-ci.org/moay/symfony-flex-server)
+
 A self hosted server for Symfony Flex allowing private recipes, customized recipes and caching functionality for the official endpoints.
 
 ![ui](https://user-images.githubusercontent.com/3605512/36627099-eb239f48-193d-11e8-919a-d98003696d7b.png)