Update PHPSpec

Author: alexislefebvre

composer.json

@@ -34,7 +34,7 @@
         "behat/mink": "^1.7",
         "behat/mink-extension": "~2.2",
         "behat/mink-browserkit-driver": "~1.3",
-        "phpspec/phpspec": "~3.4||~4.2",
+        "phpspec/phpspec": "~4.2||~5.0",
         "doctrine/data-fixtures": "^1.3",
         "nelmio/alice": "^3.4",
         "behatch/contexts": "^3.1"