Merge pull request #10 from higidi/feature/5-integrate-travis-ci

Feature/5 integrate travis ci

.travis.yml

+language: php
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+php:
+  - '5.4'
+  - '5.5'
+  - '5.6'
+  - '7.0'
+  - '7.1'
+
+install:
+  - 'composer install --prefer-dist'

README.md

@@ -3,6 +3,8 @@ About
 
 Composer plugin installs [PHP_CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer) Standards.
 
+[![Build Status](https://travis-ci.org/higidi/composer-phpcodesniffer-standards-plugin.svg?branch=master)](https://travis-ci.org/higidi/composer-phpcodesniffer-standards-plugin)
+
 Requirements
 ------------