Update composer dependencies (#325)

Author: webflo

Diff for: composer.json

@@ -19,9 +19,9 @@
         "composer/installers": "^1.2",
         "cweagans/composer-patches": "^1.6",
         "drupal-composer/drupal-scaffold": "^2.2",
-        "drupal/console": "^1.0.1",
-        "drupal/core": "~8.0",
-        "drush/drush": "~8.0|^9.0.0-beta7",
+        "drupal/console": "^1.0.2",
+        "drupal/core": "~8.4",
+        "drush/drush": "~8.0|^9.0.0-beta8",
         "webflo/drupal-finder": "^1.0.0",
         "webmozart/path-util": "^2.3"
     },