Update node.d.ts

node/node.d.ts

@@ -502,7 +502,7 @@ declare module "http" {
         statusCode: number;
         statusMessage: string;
         headersSent: boolean;
-        setHeader(name: string, value: string): void;
+        setHeader(name: string, value: string | string[]): void;
         sendDate: boolean;
         getHeader(name: string): string;
         removeHeader(name: string): void;