fix setFolder method (#188)

$this->storage_path expected to be a string, not an array

Author: ikeedo

src/Rap2hpoutre/LaravelLogViewer/LaravelLogViewer.php

@@ -57,13 +57,10 @@ public function setFolder($folder)
         if (app('files')->exists($folder)) {
             $this->folder = $folder;
         }
-        if(is_array($this->storage_path)){
-            foreach ($this->storage_path as $value) {
-                $logsPath = $value . '/' . $folder;
-                if (app('files')->exists($logsPath)) {
-                    $this->folder = $folder;
-                    break;
-                }
+        if ($this->storage_path) {
+            $logsPath = $this->storage_path . '/' . $folder;
+            if (app('files')->exists($logsPath)) {
+                $this->folder = $folder;
             }
         }
     }