add support for Coveralls

.coveralls.yml

@@ -0,0 +1 @@
+src_dir: Symfony

.travis.yml

@@ -1,17 +1,20 @@
 language: php
 
 php:
-  - 5.3
-  - 5.4
-  - 5.5
-  - 5.6
-  - hhvm
+    - 5.3
+    - 5.4
+    - 5.5
+    - 5.6
+    - hhvm
 
 sudo: false
 
 install:
-  - travis_retry composer install --no-interaction --prefer-source
+    - travis_retry composer install --no-interaction --prefer-source
 
 script:
-  - phpunit --verbose
-  - php php-cs-fixer --diff --dry-run -v fix
+    - phpunit --verbose --coverage-clover build/logs/clover.xml
+    - php php-cs-fixer --diff --dry-run -v fix
+
+after_script:
+    - php vendor/bin/coveralls -v

composer.json

@@ -23,6 +23,9 @@
         "symfony/stopwatch": "~2.5",
         "sebastian/diff": "~1.1"
     },
+    "require-dev": {
+        "satooshi/php-coveralls": "dev-master"
+    },
     "autoload": {
         "psr-4": { "Symfony\\CS\\": "Symfony/CS/" }
     },