Re-enable Symfony 3.0 in Travis tests, but remove php 5.4

Author: Yann Eugoné

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.4
   - 5.5
   - 5.6
   - hhvm
@@ -10,6 +9,7 @@ php:
 env:
     - SYMFONY_VERSION=2.7.*
     - SYMFONY_VERSION=2.8.*@dev
+    - SYMFONY_VERSION="3.0.x-dev as 2.8"
 
 sudo: false
 

composer.json

@@ -9,7 +9,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4",
+        "php": ">=5.5",
         "symfony/framework-bundle": "~2.7"
     },
     "require-dev": {