Auto merge of #4644 - rust-lang:renovate/prettier-2.x, r=locks

Update dependency prettier to v2.6.0

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [prettier](https://prettier.io) ([source](https://togithub.com/prettier/prettier)) | [`2.5.1` -> `2.6.0`](https://renovatebot.com/diffs/npm/prettier/2.5.1/2.6.0) | [![age](https://badges.renovateapi.com/packages/npm/prettier/2.6.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/prettier/2.6.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/prettier/2.6.0/compatibility-slim/2.5.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/prettier/2.6.0/confidence-slim/2.5.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>prettier/prettier</summary>

### [`v2.6.0`](https://togithub.com/prettier/prettier/blob/HEAD/CHANGELOG.md#&#8203;260)

[Compare Source](https://togithub.com/prettier/prettier/compare/2.5.1...2.6.0)

[diff](https://togithub.com/prettier/prettier/compare/2.5.1...2.6.0)

🔗 [Release Notes](https://prettier.io/blog/2022/03/16/2.6.0.html)

</details>

---

### Configuration

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Author: bors

package.json

@@ -125,7 +125,7 @@
     "nyc": "15.1.0",
     "postcss-custom-media": "8.0.0",
     "postcss-nested": "5.0.6",
-    "prettier": "2.5.1",
+    "prettier": "2.6.0",
     "qunit": "2.18.0",
     "qunit-console-grouper": "0.3.0",
     "qunit-dom": "2.0.0",

yarn.lock

@@ -11906,10 +11906,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@2.5.1:
-  version "2.5.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.5.1.tgz#fff75fa9d519c54cf0fce328c1017d94546bc56a"
-  integrity sha512-vBZcPRUR5MZJwoyi3ZoyQlc1rXeEck8KgeC9AwwOn+exuxLxq5toTRDTSaVrXHxelDMHy9zlicw8u66yxoSUFg==
+prettier@2.6.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.6.0.tgz#12f8f504c4d8ddb76475f441337542fa799207d4"
+  integrity sha512-m2FgJibYrBGGgQXNzfd0PuDGShJgRavjUoRCw1mZERIWVSXF0iLzLm+aOqTAbLnC3n6JzUhAA8uZnFVghHJ86A==
 
 pretty-bytes@6.0.0:
   version "6.0.0"