fix composer and travis

Author: tivie

.travis.yml

@@ -1,11 +1,8 @@
 language: php
 
 php:
-  - 5.4
-  - 5.5
-  - 5.6
   - 7.1
 
-install: composer install --no-dev
+install: composer install
 
 script: phpunit --configuration phpunit.xml --coverage-text --testsuite=Linux

README.md

@@ -8,6 +8,10 @@ PHP OS Detector
 
 A small PHP utility library that detects the OS the server is running on.
 
+## Compatibility
+
+Although only tested in PHP 7, PHP OS Detector should be compatible with PHP 5.3 or greater
+
 ## Installation
 You can install it by cloning the git repository or using composer.
 

composer.json

@@ -23,4 +23,4 @@
       "Tivie\\OS\\": "src/"
     }
   }
-}
+}