Update dependency autoprefixer to v10 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
autoprefixer	devDependencies	major	9.8.2 -> 10.0.0

---

Release Notes

postcss/autoprefixer

### [`v10.0.0`](https://togithub.com/postcss/autoprefixer/releases/10.0.0) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.8.6...10.0.0) Autoprefixer 10 is based on top of [PostCSS 8](https://togithub.com/postcss/postcss/releases/tag/8.0.0) (check **Known Issues** section before updating). Node.js 6.x, 8.x, 11.x support was removed. Now you need to install Autoprefixer by `npm install --save-dev autoprefixer postcss`. We moved `postcss` from `dependencies` to `peerDependencies` according to [new PostCSS plugin guidelines](https://togithub.com/postcss/postcss/blob/master/docs/guidelines/plugin.md). ### [`v9.8.6`](https://togithub.com/postcss/autoprefixer/blob/master/CHANGELOG.md#​986) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.8.5...9.8.6) - Fixed `env` option. ### [`v9.8.5`](https://togithub.com/postcss/autoprefixer/blob/master/CHANGELOG.md#​985) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.8.4...9.8.5) - Improved Grid Layout warnings (by Daniel Tonon). - Fixed `align-self` and `justify-self` with `display: flex` (by Daniel Tonon). ### [`v9.8.4`](https://togithub.com/postcss/autoprefixer/blob/master/CHANGELOG.md#​984) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.8.3...9.8.4) - Replace color output library. ### [`v9.8.3`](https://togithub.com/postcss/autoprefixer/blob/master/CHANGELOG.md#​983) [Compare Source](https://togithub.com/postcss/autoprefixer/compare/9.8.2...9.8.3) - Return old non-LTS Node.js versions to avoid breaking changes.

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Disabled by config. Please merge this manually once you are satisfied.

:recycle: Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.