[console] Require drupal/console-core master. (#3798)

Author: jmolivas

composer.json

@@ -41,7 +41,7 @@
         "composer/installers": "~1.0",
         "doctrine/annotations": "^1.2",
         "doctrine/collections": "^1.3",
-        "drupal/console-core": "1.6.0",
+        "drupal/console-core": "dev-master",
         "drupal/console-dotenv": "~0",
         "drupal/console-extend-plugin": "~0",
         "gabordemooij/redbean": "~4.3",