[whatwg/url] README: Added links to WPT dashboard, jsdom/whatwg-url and Live URL Viewer. (#407)

As discussed over email, there are a bunch of really helpful resources for implementors and editors which aren't findable from this repo itself.

Adds links to:
* [wpt.fyi](https://wpt.fyi/results/url)
* [jsdom/whatwg-url](https://github.com/jsdom/whatwg-url)
* [Live URL Viewer](https://quuz.org/url/liveview.html)
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/url/pull/407

-- Commit Summary --

  * README: Added links to WPT dashboard, jsdom/whatwg-url and Live URL Viewer.

-- File Changes --

    M README.md (18)

-- Patch Links --

https://github.com/whatwg/url/pull/407.patch
https://github.com/whatwg/url/pull/407.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/url/pull/407