remove const, so tests pass on old node

test/function/top-level-side-effects-are-preserved/asap.js

@@ -1 +1 @@
-export default function asap() {}
+export default function asap () {}

test/function/top-level-side-effects-are-preserved/config.js

@@ -1 +1 @@
-export const config = {};
+export var config = {};

test/function/top-level-side-effects-are-preserved/defer.js

@@ -1,5 +1,5 @@
 import { config } from './config';
 
-export default function defer() {
+export default function defer () {
-  config.async();
+	config.async();
 }