Anticipate asynchronous loads

lib/worker/subprocess.js

@@ -6,7 +6,7 @@ require('./ensure-forked'); // eslint-disable-line import/no-unassigned-import
 const ipc = require('./ipc');
 
 ipc.send({type: 'ready-for-options'});
-ipc.options.then(options => {
+ipc.options.then(async options => {
 	require('./options').set(options);
 	require('../chalk').set(options.chalkOptions);
 
@@ -126,7 +126,7 @@ ipc.options.then(options => {
 	}
 
 	let requireFn = require;
-	const load = ref => {
+	const load = async ref => {
 		for (const extension of extensionsToLoadAsModules) {
 			if (ref.endsWith(`.${extension}`)) {
 				ipc.send({type: 'internal-error', err: serializeError('Internal runner error', false, new Error('AVA cannot yet load ESM files.'))});
@@ -143,8 +143,8 @@ ipc.options.then(options => {
 	};
 
 	try {
-		for (const ref of (options.require || [])) {
-			const mod = load(ref);
+		for await (const ref of (options.require || [])) {
+			const mod = await load(ref);
 
 			try {
 				if (Reflect.has(mod, Symbol.for('esm:package'))) {
@@ -164,7 +164,7 @@ ipc.options.then(options => {
 			}
 		}
 
-		load(testPath);
+		await load(testPath);
 
 		if (accessedRunner) {
 			// Unreference the IPC channel if the test file required AVA. This stops it