I use v0.1.6 on jekyll v4.2.2. However, https://github.com/github/jekyll-commonmark-ghpages/pull/21/commits/9bc5971e3de5248c7a4148e4f5b79bdac32c4912 limited jekyll's version to 3.9.x. So I can't update this version now. Is there any reason for this version limitation?