bug symfony#19932 Fixed bad merge (GrahamCampbell)

This PR was submitted for the 3.1 branch but it was merged into the 2.8 branch instead (closes symfony#19932).

Discussion
----------

Fixed bad merge

| Q             | A
| ------------- | ---
| Branch?       | 3.1
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

Commits
-------

d30374d Fixed bad merge

Author: fabpot

src/Symfony/Component/Console/composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.3.9",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/debug": "~2.7,>=2.7.2"
+        "symfony/debug": "~2.7,>=2.7.2|~3.0"
     },
     "require-dev": {
         "symfony/event-dispatcher": "~2.1|~3.0.0",