fix: force esm loading exceptions to be catched by load function

Author: arlac77

lib/worker/subprocess.js

@@ -138,7 +138,7 @@ ipc.options.then(async options => {
 		for (const extension of extensionsToLoadAsModules) {
 			if (ref.endsWith(`.${extension}`)) {
 				try {
-					return import(ref);
+					return await import(ref); // eslint-disable-line no-await-in-loop
 				} catch {}
 
 				ipc.send({type: 'internal-error', err: serializeError('Internal runner error', false, new Error('AVA cannot yet load ESM files.'))});