Source spec table from macros in web/web_components

[teoli2003]

This is part of #1146.

This converts the web/web_components pages to the {{Specifications}} macro.

[github-actions]

Preview URLs

• https://pr6425.content.dev.mdn.mozit.cloud/en-US/docs/Web/Web_Components
• https://pr6425.content.dev.mdn.mozit.cloud/en-US/docs/Web/Web_Components/HTML_Imports

Flaws

None! 🎉

External URLs

URL: /en-US/docs/Web/Web_Components
Title: Web Components
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/Web_Components/HTML_Imports
Title: HTML Imports
on GitHub

• https://github.com/webcomponents/webcomponentsjs (1 time) (Note! This may be a new URL 👀)
• https://hacks.mozilla.org/2015/06/the-state-of-web-components/ (1 time) (Note! This may be a new URL 👀)

(this comment was updated 2021-06-28 17:36:46.702939)