Add stat/device-basic endpoint (#188)

Merge to include device-basic endpoint

src/Client.php

@@ -1397,6 +1397,16 @@ public function list_users()
         return $this->fetch_results('/api/s/' . $this->site . '/list/user');
     }
 
+    /**
+     * List of site devices with a basic subset of fields (e.g., mac, state, adopted, disabled, type, model, name)
+     *
+     * @return array|false an array containing known UniFi device objects), false upon error
+     */
+    public function list_devices_basic()
+    {
+        return $this->fetch_results('/api/s/' . $this->site . '/stat/device-basic');
+    }
+
     /**
      * Fetch UniFi devices
      *