#3445064: Add composer.json to require DKAN

composer.json

+{
+  "name": "drupal/dkan_datastore_import_tweak",
+  "description": "Finetune some features of DKAN datastore imports",
+  "type": "drupal-module",
+  "license": "GPL-2.0-or-later",
+  "authors": [
+    {
+      "name": "Stefan Korn (stefan.korn)",
+      "homepage": "https://www.drupal.org/u/stefan.korn",
+      "role": "Maintainer"
+    }
+  ],
+  "homepage": "https://drupal.org/project/dkan_datastore_import_tweak",
+  "support": {
+    "issues": "https://drupal.org/project/issues/dkan_datastore_import_tweak",
+    "source": "https://git.drupalcode.org/project/dkan_datastore_import_tweak"
+  },
+  "require": {
+    "getdkan/dkan": "^2"
+  }
+}
+