update PHP Coveralls

.coveralls.yml

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

composer.json

@@ -25,7 +25,7 @@
         "sebastian/diff": "~1.1"
     },
     "require-dev": {
-        "satooshi/php-coveralls": "0.7.*@dev"
+        "satooshi/php-coveralls": "^1.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\CS\\": "Symfony/CS/" }