fix linter error

Author: jamestalmage

lib/test-worker.js

@@ -28,7 +28,7 @@ globals.options = opts;
 const serializeError = require('./serialize-error');
 
 (opts.require || []).forEach(x => {
-	if (/.*std[\/\\]esm[\/\\]index\.js$/.test(x)) {
+	if (/.*std[/\\]esm[/\\]index\.js$/.test(x)) {
 		require = require(x)(module); // eslint-disable-line no-global-assign
 	} else {
 		require(x);