all these changes

backend/node_modules/@hapi/hoek/lib/flatten.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const internals = {};
+
+
+module.exports = internals.flatten = function (array, target) {
+
+    const result = target || [];
+
+    for (const entry of array) {
+        if (Array.isArray(entry)) {
+            internals.flatten(entry, result);
+        }
+        else {
+            result.push(entry);
+        }
+    }
+
+    return result;
+};