Add Antibot

composer.json

@@ -34,6 +34,7 @@
         "drupal-composer/drupal-scaffold": "^2.3",
         "drupal/address": "^1.2",
         "drupal/admin_toolbar": "~1.17",
+        "drupal/antibot": "^1.2",
         "drupal/block_class": "1.x-dev",
         "drupal/browser_refresh": "^1.3",
         "drupal/coffee": "^1.0@beta",