Switch links to the GitHub organization and fix redirected links

config.yml: update popper.js to v1.16.0

Add link to Icons site in our docs

Also, fix the `update-deps` excludes and add karma since 4.x requires Node.js >= 8.

* Prep for v4.3.0

* More updates for v4.3.0.

* rerun to build docs source map

- Move 4.1 docs to 4.2
- Update versions everywhere to 4.1.3 with release script
- Manually bump the shorthand version in package.json
- Add 4.2 to the versions docs page
- Update some redirects
- Fix tests asset URLs
- Bump Nuget and more

`0.0.0.0` has issues on Windows.

Also, remove popper.js from this script since it's not present in the repo.

With the current docs directory setup, I'm making too many mistakes and have to manually address path changes and directory moves on deploy. This makes for a frustrating experience developing locally and shipping releases. With this PR, we're basically back to the same setup from v3—duplicating the dist directory into our docs directory. Not the most ideal, but very straightforward for me as the release manager.

* update docs path from docs/4.0/ to docs/4.1/

* bump version to 4.1.0

* Update redirects to work for 4.1 docs move

* Update docs version switcher to include latest and link to 4.0 docs

* re-run dist

* Update package-lock.json

* Update docs-navbar.html

While the old one will keep working, better switch to the new one.

This reverts commit 70520855.

While the old one will keep working, better switch to the new one.