[fuzz result] parser sees links with unbalanced `[]` inside

[notriddle]

This markdown input:

[[]](https://haskell.org)

[[][]](https://haskell.org)

[[[][]](https://haskell.org)

[[][][]](https://haskell.org)

In commonmark-hs, it makes this HTML:

<p><a href="https://haskell.org">[]</a></p>
<p>[<a href="https://haskell.org">][]</a></p>
<p>[[<a href="https://haskell.org">][]</a></p>
<p>[[]<a href="https://haskell.org">][]</a></p>

In commonmark.js, it makes this instead:

<p><a href="https://haskell.org">[]</a></p>
<p><a href="https://haskell.org">[][]</a></p>
<p>[<a href="https://haskell.org">[][]</a></p>
<p><a href="https://haskell.org">[][][]</a></p>

The commonmark.js output seems to be correct according to the specification:

Brackets are allowed in the link text only if (a) they are backslash-escaped or (b) they appear as a matched pair of brackets, with an open bracket [, a sequence of zero or more inlines, and a close bracket ].