Add ctools, prior to using it.

composer.json

@@ -28,7 +28,8 @@
     "drupal/token" : "^1.3",
     "drupal/flysystem" : "^2.0@alpha",
     "islandora/crayfish-commons": "^2",
-    "drupal/file_replace": "^1.1"
+    "drupal/file_replace": "^1.1",
+    "drupal/ctools": "^3"
   },
   "require-dev": {
     "phpunit/phpunit": "^6",

islandora.info.yml

@@ -32,3 +32,4 @@ dependencies:
   - drupal:flysystem
   - drupal:token
   - drupal:file_replace
+  - ctools:ctools