Merge pull request #121 from mmikkel/craft3

Fixes "The requested resource could not be found" error in /interest-categories API request

Author: mmikkel

src/services/MailchimpSubscribeService.php

@@ -521,7 +521,7 @@ public function getInterestGroups($audienceId = '')
                 $categoryData['interests'] = [];
 
                 /** @var Collection $interestsResult */
-                $interestsResult = $mc->request('lists/' . $audienceId . '/interest-categories/' . $category->id . '/interests&count=100');
+                $interestsResult = $mc->request('lists/' . $audienceId . '/interest-categories/' . $category->id . '/interests', ['count' => 100]);
 
                 foreach ($interestsResult['interests'] as $interest) {
                     $interestData = [];