style: change return type.

Response -> ResponseInterface

Author: ytetsuro

system/HTTP/DownloadResponse.php

@@ -365,7 +365,7 @@ public function buildHeaders()
 	/**
 	 * Sends the headers of this HTTP request to the browser.
 	 *
-	 * @return Response
+	 * @return DownloadResponse
 	 */
 	public function sendHeaders()
 	{

system/HTTP/ResponseInterface.php

@@ -166,7 +166,7 @@ public function getReason(): string;
 	 *
 	 * @param \DateTime $date
 	 *
-	 * @return Response
+	 * @return ResponseInterface
 	 */
 	public function setDate(\DateTime $date);
 
@@ -179,7 +179,7 @@ public function setDate(\DateTime $date);
 	 * @param string $mime
 	 * @param string $charset
 	 *
-	 * @return Response
+	 * @return ResponseInterface
 	 */
 	public function setContentType(string $mime, string $charset = 'UTF-8');
 
@@ -224,7 +224,7 @@ public function noCache();
 	 *
 	 * @param array $options
 	 *
-	 * @return Response
+	 * @return ResponseInterface
 	 */
 	public function setCache(array $options = []);
 
@@ -248,7 +248,7 @@ public function setLastModified($date);
 	/**
 	 * Sends the output to the browser.
 	 *
-	 * @return Response
+	 * @return ResponseInterface
 	 */
 	public function send();