Added endpoint and methods to get issues assigned to a milestone. Fixes GitLabPHP#66

Author: Matt Humphrey

lib/Gitlab/Api/Milestones.php

@@ -46,4 +46,14 @@ public function update($project_id, $milestone_id, array $params)
     {
         return $this->put($this->getProjectPath($project_id, '/milestones/'.urlencode($milestone_id)), $params);
     }
+
+    /**
+     * @param int $project_id
+     * @param int $milestone_id
+     * @return mixed
+     */
+    public function issues($project_id, $milestone_id)
+    {
+        return $this->get($this->getProjectPath($project_id, '/milestones/'.urlencode($milestone_id).'/issues'));
+    }
 }

lib/Gitlab/Model/Milestone.php

@@ -97,4 +97,19 @@ public function incomplete()
     {
         return $this->update(array('closed' => false));
     }
+
+    /**
+     * @return Issue[]
+     */
+    public function issues()
+    {
+        $data = $this->api('milestones')->issues($this->project->id, $this->id);
+
+        $issues = array();
+        foreach ($data as $issue) {
+            $issues[] = Issue::fromArray($this->getClient(), $this->project, $issue);
+        }
+
+        return $issues;
+    }
 }

lib/Gitlab/Model/Project.php

@@ -793,6 +793,17 @@ public function updateMilestone($id, array $params)
         return $milestone->update($params);
     }
 
+    /**
+     * @param int $id
+     * @return Issue[]
+     */
+    public function milestoneIssues($id)
+    {
+        $milestone = new Milestone($this, $id, $this->getClient());
+
+        return $milestone->issues();
+    }
+
     /**
      * @return Snippet[]
      */