merged branch romainneutron/symfony-2.4 (PR #764)

This PR was squashed before being merged into the master branch (closes #764).

Discussion
----------

Enable compatibility and testing with Symfony 2.4

Hello,

Symfony 2.4 is scheduled for november then, according to Symfony release process, the stabilization phase should start in september.

I think it's a good idea to add Symfony 2.4 compatibility as it seems there's no breakage and some people would like to work on the 2.4 branch while working on Silex.

Commits
-------

0819b49a Enable compatibility and testing with Symfony 2.4

.travis.yml

@@ -2,10 +2,12 @@ language: php
 
 env:
     - SYMFONY_DEPS_VERSION=2.3
+    - SYMFONY_DEPS_VERSION=2.4
 
 before_script:
     # symfony/*
-    - sh -c "if [ '$SYMFONY_DEPS_VERSION' = '2.3' ]; then sed -i 's/>=2.3,<2.4-dev/2.3.*@dev/g' composer.json; composer update --dev --prefer-source; fi"
+    - sh -c "if [ '$SYMFONY_DEPS_VERSION' = '2.4' ]; then sed -i 's/>=2.3,<2.5-dev/2.4.*@dev/g' composer.json; composer update --dev --prefer-source; fi"
+    - sh -c "if [ '$SYMFONY_DEPS_VERSION' = '2.3' ]; then sed -i 's/>=2.3,<2.5-dev/2.3.*@dev/g' composer.json; composer update --dev --prefer-source; fi"
     - composer install --dev --prefer-source
 
 script: vendor/bin/phpunit

composer.json

@@ -18,27 +18,27 @@
     "require": {
         "php": ">=5.3.3",
         "pimple/pimple": "1.*",
-        "symfony/event-dispatcher": ">=2.3,<2.4-dev",
-        "symfony/http-foundation": ">=2.3,<2.4-dev",
-        "symfony/http-kernel": ">=2.3,<2.4-dev",
-        "symfony/routing": ">=2.3,<2.4-dev"
+        "symfony/event-dispatcher": ">=2.3,<2.5-dev",
+        "symfony/http-foundation": ">=2.3,<2.5-dev",
+        "symfony/http-kernel": ">=2.3,<2.5-dev",
+        "symfony/routing": ">=2.3,<2.5-dev"
     },
     "require-dev": {
-        "symfony/security": ">=2.3,<2.4-dev",
-        "symfony/config": ">=2.3,<2.4-dev",
-        "symfony/locale": ">=2.3,<2.4-dev",
-        "symfony/form": ">=2.3,<2.4-dev",
-        "symfony/browser-kit": ">=2.3,<2.4-dev",
-        "symfony/css-selector": ">=2.3,<2.4-dev",
-        "symfony/dom-crawler": ">=2.3,<2.4-dev",
-        "symfony/finder": ">=2.3,<2.4-dev",
-        "symfony/monolog-bridge": ">=2.3,<2.4-dev",
-        "symfony/options-resolver": ">=2.3,<2.4-dev",
-        "symfony/process": ">=2.3,<2.4-dev",
-        "symfony/serializer": ">=2.3,<2.4-dev",
-        "symfony/translation": ">=2.3,<2.4-dev",
-        "symfony/twig-bridge": ">=2.3,<2.4-dev",
-        "symfony/validator": ">=2.3,<2.4-dev",
+        "symfony/security": ">=2.3,<2.5-dev",
+        "symfony/config": ">=2.3,<2.5-dev",
+        "symfony/locale": ">=2.3,<2.5-dev",
+        "symfony/form": ">=2.3,<2.5-dev",
+        "symfony/browser-kit": ">=2.3,<2.5-dev",
+        "symfony/css-selector": ">=2.3,<2.5-dev",
+        "symfony/dom-crawler": ">=2.3,<2.5-dev",
+        "symfony/finder": ">=2.3,<2.5-dev",
+        "symfony/monolog-bridge": ">=2.3,<2.5-dev",
+        "symfony/options-resolver": ">=2.3,<2.5-dev",
+        "symfony/process": ">=2.3,<2.5-dev",
+        "symfony/serializer": ">=2.3,<2.5-dev",
+        "symfony/translation": ">=2.3,<2.5-dev",
+        "symfony/twig-bridge": ">=2.3,<2.5-dev",
+        "symfony/validator": ">=2.3,<2.5-dev",
         "twig/twig": ">=1.8.0,<2.0-dev",
         "doctrine/dbal": ">=2.2.0,<2.4.0-dev",
         "swiftmailer/swiftmailer": "5.*",
@@ -46,10 +46,10 @@
         "phpunit/phpunit": "~3.7"
     },
     "suggest": {
-        "symfony/browser-kit": ">=2.3,<2.4-dev",
-        "symfony/css-selector": ">=2.3,<2.4-dev",
-        "symfony/dom-crawler": ">=2.3,<2.4-dev",
-        "symfony/form": ">=2.3,<2.4-dev"
+        "symfony/browser-kit": ">=2.3,<2.5-dev",
+        "symfony/css-selector": ">=2.3,<2.5-dev",
+        "symfony/dom-crawler": ">=2.3,<2.5-dev",
+        "symfony/form": ">=2.3,<2.5-dev"
     },
     "autoload": {
         "psr-0": { "Silex": "src/" }