`**` does not work when in parentheses

[benmccann]

The following prints false when I'd expect it to print true:

const pm = require('picomatch');

console.log(pm('test(/utils/**)')('test/utils'));
console.log(pm('test?(/utils/**)')('test/utils'));

On the otherhand, pm('test/utils/**')('test/utils) behaves as expected