build(deps): bump postcss-loader from 6.2.1 to 7.0.0 (#840)

* build(deps): bump postcss-loader from 6.2.1 to 7.0.0

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 6.2.1 to 7.0.0.
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/postcss-loader/compare/v6.2.1...v7.0.0)

---
updated-dependencies:
- dependency-name: postcss-loader
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* [dependabot skip] Fix yarn.lock

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: dependabot-fix <dependabot-fix@example.com>

package.json

@@ -71,7 +71,7 @@
         "navigator.locks": "^0.8.5",
         "postcss": "^8.4.4",
         "postcss-flexbugs-fixes": "^5.0.2",
-        "postcss-loader": "^6.2.1",
+        "postcss-loader": "^7.0.0",
         "postcss-normalize": "^10.0.1",
         "postcss-preset-env": "^7.7.0",
         "prompts": "^2.4.2",