Update test.js

test.js

@@ -107,7 +107,7 @@ test('don\'t delete files, but return them - sync', t => {
 	]);
 });
 
-// Currently this only testable locally on an osx machine.
+// Currently this is only testable locally on macOS.
 // https://github.com/sindresorhus/del/issues/68
 test.serial('does not throw EINVAL - async', async t => {
 	const nestedFile = path.resolve(t.context.tmp, 'a/b/c/nested.js');