Checklist

• I am running the latest version. Installing Isso from GitHub from the master branch does not fix my issue
• I have checked the troubleshooting guide
• I have searched the open issues, but my issue has not already been reported

What is not working?

markdown syntax which produce a tag, missing the data-xxx property

How can one reproduce this issue?

[baidu](https://www.baidu.com){data-link-name='baidu'}

And if I am using the <a href="https://www.baidu.com" data-link-name="baidu">baidu</a>, it also did not work.

What should I do?