Update symfony/console dependency version (#2)

* Fix StatusTest where job is already deleted after completion (broken with commit 5100483)
* Improve test name and add another assert
* Raise supported symfony/console version to 2.7 and composer update

composer.json

@@ -4,7 +4,7 @@
     "name":        "innogames/php-resque",
     "description": "Port of vend/resque which is the namespaced port of chrisbolton/php-resque, supports Predis, more DI",
     "license":     "MIT",
-    "minimum-stability": "dev",
+    "minimum-stability": "stable",
     "authors": [
         {
             "name": "Chris Boulton",
@@ -33,7 +33,7 @@
     "require": {
         "php":                ">=5.3.7",
         "psr/log":            "1.0.0",
-        "symfony/console":    "~2.5.6"
+        "symfony/console":    "^2.7"
     },
 
     "require-dev": {