Integrate pending Pull request from main w3c/tidy-html5

[allan-simon]

As this repository seems to be quite active compare to the main one who hasn't be updated for now 2 years, is it possible to integrate here all the pending request that starts to accumulate ?

If you do so (which would be really great), it may be interesting to change the README to explain this, and to put a message on w3c/tidy-html5 to tell people to put pull request/issue in your repo.