Add callback to server.close() (#444)

Author: ethanmay

.changeset/nasty-drinks-talk.md

@@ -0,0 +1,5 @@
+---
+"10up-toolkit": minor
+---
+
+Added callback to webpack server.close

packages/toolkit/scripts/start.js

@@ -77,7 +77,7 @@ if (hot) {
 
 process.on('SIGINT', () => {
 	if (server) {
-		server.close();
+		server.close(() => {});
 	}
 
 	compiler.close();