Update dependency unified to v11 (#419)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [unified](https://unifiedjs.com) ([source](https://togithub.com/unifiedjs/unified)) | [`8.4.2` -> `11.0.3`](https://renovatebot.com/diffs/npm/unified/8.4.2/11.0.3) | [![age](https://developer.mend.io/api/mc/badges/age/npm/unified/11.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/unified/11.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/unified/8.4.2/11.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/unified/8.4.2/11.0.3?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>unifiedjs/unified (unified)</summary>

### [`v11.0.3`](https://togithub.com/unifiedjs/unified/releases/tag/11.0.3)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/11.0.2...11.0.3)

##### Fix

-   [`8dee2ab`](https://togithub.com/unifiedjs/unified/commit/8dee2ab) Fix support for functions in data

**Full Changelog**: unifiedjs/unified@11.0.2...11.0.3

### [`v11.0.2`](https://togithub.com/unifiedjs/unified/releases/tag/11.0.2)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/11.0.1...11.0.2)

-   [`cea788b`](https://togithub.com/unifiedjs/unified/commit/cea788b) Fix type of settings if nothing is registered yet

**Full Changelog**: unifiedjs/unified@11.0.1...11.0.2

### [`v11.0.1`](https://togithub.com/unifiedjs/unified/releases/tag/11.0.1)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/11.0.0...11.0.1)

-   [`d1a915d`](https://togithub.com/unifiedjs/unified/commit/d1a915d) Fix incorrect type of `settings` in presets

**Full Changelog**: unifiedjs/unified@11.0.0...11.0.1

### [`v11.0.0`](https://togithub.com/unifiedjs/unified/releases/tag/11.0.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/10.1.2...11.0.0)

##### Change

-   [`baf80b2`](https://togithub.com/unifiedjs/unified/commit/baf80b2) Change to require Node.js 16
    **migrate**: update too
-   [`dd9834a`](https://togithub.com/unifiedjs/unified/commit/dd9834a) Update `@types/unist`
    **migrate**: update too
-   [`620ccf9`](https://togithub.com/unifiedjs/unified/commit/620ccf9) Update [`vfile`](https://togithub.com/vfile/vfile/releases/tag/6.0.0)
    **migrate**: update too

##### Change (unlikey to affect you)

-   [`a44db46`](https://togithub.com/unifiedjs/unified/commit/a44db46) Add `Data`, `Settings` types to augment shared data
    **migrate**: if you deal with data, type it, see commit for info
-   [`fb49556`](https://togithub.com/unifiedjs/unified/commit/fb49556) Change to replace `Buffer` with `Uint8Array`
    **migrate**: you’re probably fine unless you use weird encodings, see commit for details if so
-   [`f3e71a8`](https://togithub.com/unifiedjs/unified/commit/f3e71a8) Remove `Attacher` type
    **migrate**: use `Plugin` instead
-   [`cc53bb6`](https://togithub.com/unifiedjs/unified/commit/cc53bb6) Remove `FrozenProcessor` type
    **migrate**: use `Processor` instead
-   [`1aa3494`](https://togithub.com/unifiedjs/unified/commit/1aa3494) Change to yield `undefined`, not `null`
    **migrate**: expect `undefined`
-   [`932c140`](https://togithub.com/unifiedjs/unified/commit/932c140) Change to use `exports`
    **migrate**: don’t use private APIs
-   [`8e57478`](https://togithub.com/unifiedjs/unified/commit/8e57478) Remove support for classes as compilers, parsers
    **migrate**: if you love classes, see commit message
-   [`4676814`](https://togithub.com/unifiedjs/unified/commit/4676814) Remove support for compilers returning nullish
    **migrate**: nobody did that
-   [`807ffb9`](https://togithub.com/unifiedjs/unified/commit/807ffb9) Add improved types
    **migrate**: it’s probably just better if anything changed at all
-   [`b35afe0`](https://togithub.com/unifiedjs/unified/commit/b35afe0) Add useful error on empty presets
    by [@&#8203;wooorm](https://togithub.com/wooorm) in [https://github.com/unifiedjs/unified/pull/202](https://togithub.com/unifiedjs/unified/pull/202)
-   [`6f068a0`](https://togithub.com/unifiedjs/unified/commit/6f068a0) Fix to deep clone preset settings
-   [`56ee288`](https://togithub.com/unifiedjs/unified/commit/56ee288) Fix non-first parameter merging when reconfiguring plugins

##### Misc

-   [`e58b095`](https://togithub.com/unifiedjs/unified/commit/e58b095) [`ad06700`](https://togithub.com/unifiedjs/unified/commit/ad06700) [`40f0329`](https://togithub.com/unifiedjs/unified/commit/40f0329) Refactor code-style
-   [`ffc146c`](https://togithub.com/unifiedjs/unified/commit/ffc146c) Update `typescript`
    by [@&#8203;ChristianMurphy](https://togithub.com/ChristianMurphy) in [https://github.com/unifiedjs/unified/pull/216](https://togithub.com/unifiedjs/unified/pull/216)
-   [`7148746`](https://togithub.com/unifiedjs/unified/commit/7148746) [`144eec0`](https://togithub.com/unifiedjs/unified/commit/144eec0) [`2d95451`](https://togithub.com/unifiedjs/unified/commit/2d95451) Add improved docs
-   [`afb704a`](https://togithub.com/unifiedjs/unified/commit/afb704a) Fix some typos
    by [@&#8203;ChristianMurphy](https://togithub.com/ChristianMurphy) in [https://github.com/unifiedjs/unified/pull/225](https://togithub.com/unifiedjs/unified/pull/225)
-   [`2aa15ea`](https://togithub.com/unifiedjs/unified/commit/2aa15ea) Refactor types
-   [`a06537c`](https://togithub.com/unifiedjs/unified/commit/a06537c) Add sponsor

**Full Changelog**: unifiedjs/unified@10.1.2...11.0.0

### [`v10.1.2`](https://togithub.com/unifiedjs/unified/releases/tag/10.1.2)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/10.1.1...10.1.2)

-   [`dc85d21`](https://togithub.com/unifiedjs/unified/commit/dc85d21) Fix typo
    by [@&#8203;jablko](https://togithub.com/jablko) in [https://github.com/unifiedjs/unified/pull/185](https://togithub.com/unifiedjs/unified/pull/185)

**Full Changelog**: unifiedjs/unified@10.1.1...10.1.2

### [`v10.1.1`](https://togithub.com/unifiedjs/unified/releases/tag/10.1.1)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/10.1.0...10.1.1)

-   [`6b060c2`](https://togithub.com/unifiedjs/unified/commit/6b060c2) Fix type of `run` signature
    by [@&#8203;alvinleung1996](https://togithub.com/alvinleung1996) in [https://github.com/unifiedjs/unified/pull/174](https://togithub.com/unifiedjs/unified/pull/174)

**Full Changelog**: unifiedjs/unified@10.1.0...10.1.1

### [`v10.1.0`](https://togithub.com/unifiedjs/unified/releases/tag/10.1.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/10.0.1...10.1.0)

-   [`134ecad`](https://togithub.com/unifiedjs/unified/commit/134ecad) Add plugin input/output type parameters

### [`v10.0.1`](https://togithub.com/unifiedjs/unified/releases/tag/10.0.1)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/10.0.0...10.0.1)

-   [`591b0c0`](https://togithub.com/unifiedjs/unified/commit/591b0c0) Fix types to support `void` async transformers

### [`v10.0.0`](https://togithub.com/unifiedjs/unified/releases/tag/10.0.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/9.2.2...10.0.0)

##### Breaking

-   [`dc46bc5`](https://togithub.com/unifiedjs/unified/commit/dc46bc5) Use ESM and update `vfile`
    -   Change:

        ```js
        // from cjs import
        var unified = require('unified')

        // to esm import
        import {unified} from 'unified'
        ```

        Learn [more about ESM in this guide](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c)
    -   **Breaking**: this updates `vfile`, which importantly renames ~~`vfile.contents`~~ to `vfile.value`. See [`vfile@5`](https://togithub.com/vfile/vfile/releases/tag/5.0.0)
    -   Inconsequential: this updates `trough`, which removes support for Promise-like objects returned from plugins, in favor of only support actual promises. To update, instead of returning an object with a `then` function, return and *actual* promise

##### Types

-   [`b3e2464`](https://togithub.com/unifiedjs/unified/commit/b3e2464) Rewrite types
    -   Removed the type parameter `P` for processor settings
    -   Use `any[]` instead of `[Record<string, unknown>?]` for the default plugin type parameters
-   [`45eb72e`](https://togithub.com/unifiedjs/unified/commit/45eb72e) Update types for ESM
-   [`2c7ba99`](https://togithub.com/unifiedjs/unified/commit/2c7ba99) [`8eda349`](https://togithub.com/unifiedjs/unified/commit/8eda349) Add explicit dependency on `@types/unist`
-   [`0e8f611`](https://togithub.com/unifiedjs/unified/commit/0e8f611) Remove typescript@3 legacy support
-   [`350ed9d`](https://togithub.com/unifiedjs/unified/commit/350ed9d) Fix `next` in types of transformer signature
-   [`b22bf8e`](https://togithub.com/unifiedjs/unified/commit/b22bf8e) Add support for buffer, other return values
-   [`4bfd6c8`](https://togithub.com/unifiedjs/unified/commit/4bfd6c8) [`b8fe5ec`](https://togithub.com/unifiedjs/unified/commit/b8fe5ec) [`6ef3933`](https://togithub.com/unifiedjs/unified/commit/6ef3933) Add support for boolean plugin options

##### Project

-   [`88374fc`](https://togithub.com/unifiedjs/unified/commit/88374fc) Add `esast` to list of syntax trees
-   [`a6ff3c1`](https://togithub.com/unifiedjs/unified/commit/a6ff3c1) Fix links
-   [`ee6ee47`](https://togithub.com/unifiedjs/unified/commit/ee6ee47) Update examples in `readme.md`
-   [`32abf7c`](https://togithub.com/unifiedjs/unified/commit/32abf7c) [`60de570`](https://togithub.com/unifiedjs/unified/commit/60de570) [`115898a`](https://togithub.com/unifiedjs/unified/commit/115898a) Refactor code style

### [`v9.2.2`](https://togithub.com/unifiedjs/unified/releases/tag/9.2.2)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/9.2.1...9.2.2)

-   [`bc50a01`](https://togithub.com/unifiedjs/unified/commit/bc50a01) Fix to set `vfile.value` if a vfile@5 is given

### [`v9.2.1`](https://togithub.com/unifiedjs/unified/releases/tag/9.2.1)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/9.2.0...9.2.1)

-   [`fe51be2`](https://togithub.com/unifiedjs/unified/commit/fe51be2) Fix mutating options
-   [`8f135d0`](https://togithub.com/unifiedjs/unified/commit/8f135d0) Refactor to improve bundle size
-   [`ad12369`](https://togithub.com/unifiedjs/unified/commit/ad12369) Remove outdated description of compile results

### [`v9.2.0`](https://togithub.com/unifiedjs/unified/releases/tag/9.2.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/9.1.0...9.2.0)

-   [`7fc4271`](https://togithub.com/unifiedjs/unified/commit/7fc4271) Add variadic tuple types for plugin tuple

### [`v9.1.0`](https://togithub.com/unifiedjs/unified/releases/tag/9.1.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/9.0.0...9.1.0)

-   [`56fdba4`](https://togithub.com/unifiedjs/unified/commit/56fdba4) Add `FrozenProcessor` interface to types

### [`v9.0.0`](https://togithub.com/unifiedjs/unified/releases/tag/9.0.0)

[Compare Source](https://togithub.com/unifiedjs/unified/compare/8.4.2...9.0.0)

-   [`c3ba172`](https://togithub.com/unifiedjs/unified/commit/c3ba172) Set `file.result` when processing to non-text
    (**breaking**, if you’re using `.process` or `.processSync` with a compiler that returns an object, then those results were available at ~~`file.contents`~~ and are now at `file.result`)

</details>

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.github/actions/validate-docs-links/package.json

@@ -22,7 +22,7 @@
     "rehype-raw": "7.0.0",
     "remark-parse": "11.0.0",
     "remark-rehype": "11.0.0",
-    "unified": "8.4.2",
+    "unified": "11.0.3",
     "unist-util-visit": "2.0.3"
   }
 }