Update composer dependencies to use "symfony/console": "~2.7" instead of "symfony/console": "2.7.*@dev".

Author: tomzx

composer.json

@@ -30,7 +30,7 @@
 
 		"herrera-io/phar-update": "~2.0",
 		"nikic/php-parser": "dev-features/php-semver-checker",
-		"symfony/console": "2.7.*@dev",
+		"symfony/console": "~2.7",
 		"tomzx/finder": "~0.1@dev"
 	},
 	"require-dev": {