allow sf3

.travis.yml

@@ -1,12 +1,33 @@
 language: php
 
+sudo: false
+
 php:
   - 5.3
   - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
 
-before_script:
-  - curl -s http://getcomposer.org/installer | php -- --quiet
-  - php composer.phar install --dev
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+matrix:
+  include:
+    - php: 5.6
+      env: SYMFONY_VERSION='~2.3'
+    - php: 5.6
+      env: SYMFONY_VERSION='~2.8'
+    - php: 5.6
+      env: SYMFONY_VERSION='~3.0'
+
+
+before_install:
+  - composer self-update
+  - sh -c 'if [ "$SYMFONY_VERSION" != "" ]; then composer require --no-update symfony/symfony=$SYMFONY_VERSION; fi;'
+
+install: composer install
 
 script:
   - php bin/phpunit --coverage-text

composer.json

@@ -16,12 +16,12 @@
         }
     ],
     "require":      {
-        "symfony/framework-bundle": "2.*",
-        "knplabs/gaufrette":        "~0.1.7|0.2.*@dev"
+        "symfony/framework-bundle": "~2.0|~3.0",
+        "knplabs/gaufrette":        "~0.1.7|~0.2"
     },
     "require-dev": {
-        "symfony/yaml": "2.*",
-        "symfony/console": "2.*",
+        "symfony/yaml": "~2.0|~3.0",
+        "symfony/console": "~2.0|~3.0",
         "phpunit/phpunit": "~4.2"
     },
     "autoload":     {