Fix Immutable track()

Author: marcandrews

src/utils/find-key.js

@@ -1,17 +1,22 @@
+import { List } from 'immutable';
 
 export default function findKey(object, predicate) {
   let resultKey;
 
-  Object.keys(object).some((key) => {
-    const isKey = predicate(object[key], key, object);
+  if (List.isList(object)) {
+    resultKey = object.findKey(predicate);
+  } else {
+    Object.keys(object).some((key) => {
+      const isKey = predicate(object[key], key, object);
 
-    if (isKey) {
-      resultKey = key;
-      return true;
-    }
+      if (isKey) {
+        resultKey = key;
+        return true;
+      }
 
-    return false;
-  });
+      return false;
+    });
+  }
 
   return resultKey;
 }