* Remove unneeded rule suppression
* Format tests/unit/.eslintrc.json
* build/.eslintrc.json: add strict for consistency

* Bump eslint-plugin-unicorn from 18.0.1 to 19.0.1

Bumps [eslint-plugin-unicorn](https://github.com/sindresorhus/eslint-plugin-unicorn) from 18.0.1 to 19.0.1.
- [Release notes](https://github.com/sindresorhus/eslint-plugin-unicorn/releases)
- [Commits](https://github.com/sindresorhus/eslint-plugin-unicorn/compare/v18.0.1...v19.0.1

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* ESlint: disable a few new rules for now.

* unicorn/no-fn-reference-in-iterator
* unicorn/no-null

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

* Remove unneeded ESLint suppression

* Regenerate package-lock.json

Notably:

* bundlesize 0.15.3 → ^0.17.2
* eslint-plugin-unicorn ^8.0.2 → ^9.0.0
* terser ^3.17.0 → ^4.0.0

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.

Also, refactor ESLint and stylelint config files; now everything will work from our root dir.