Honor implied end tags for dt and dd

[adarshx01]

Fixes #315

HTML lets dt/dd omit their end tags. The parser didn't close them when the next dt/dd started or when dl/body/html closed, so the stack didn't match and the leftover-tag cleanup dropped body/dl.

Same implied-end-tag tables already used for li/p/td.

[taoqf]

https://developer.mozilla.org/en-US/docs/Glossary/Void_element
According to this, dt&dd are not void elements.

[adarshx01]

https://developer.mozilla.org/en-US/docs/Glossary/Void_element According to this, dt&dd are not void elements.

Thanks - agreed, dt and dd are not void elements, and this PR does not add them to voidTag.tags.

Void elements (br, img, …) cannot have children. dt/dd can; HTML only allows omitting the end tag:

https://html.spec.whatwg.org/multipage/syntax.html#optional-tags
https://html.spec.whatwg.org/multipage/grouping-content.html#the-dt-element

This repo already handles that for li/p/td via kElementsClosedByOpening / kElementsClosedByClosing. Same thing here so <dl><dt><dd></dl> does not leave dt/dd on the stack and get body/dl stripped (#315).

Happy to add a code comment on those entries making “optional end tag, not void” explicit if that helps.

[taoqf]

My mistake . Thank you. node-html-parser@9.0.4 released.