Auto merge of #3692 - rust-lang:renovate/postcss-8.x, r=Turbo87

Update dependency postcss to v8.3.1

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [postcss](https://postcss.org/) ([source](https://github.com/postcss/postcss)) | [`8.3.0` -> `8.3.1`](https://renovatebot.com/diffs/npm/postcss/8.3.0/8.3.1) | [![age](https://badges.renovateapi.com/packages/npm/postcss/8.3.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/postcss/8.3.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/postcss/8.3.1/compatibility-slim/8.3.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/postcss/8.3.1/confidence-slim/8.3.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>postcss/postcss</summary>

### [`v8.3.1`](https://github.com/postcss/postcss/blob/master/CHANGELOG.md#&#8203;831)

[Compare Source](https://github.com/postcss/postcss/compare/8.3.0...8.3.1)

-   Fixed false positives `PostCSS does nothing` warning on `syntax` option.

</details>

---

### Configuration

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Author: bors

package.json

@@ -129,7 +129,7 @@
     "webpack": "5.38.1"
   },
   "resolutions": {
-    "ember-css-modules/postcss": "8.3.0",
+    "ember-css-modules/postcss": "8.3.1",
     "ember-inflector": "4.0.1"
   },
   "engines": {

yarn.lock

@@ -12263,10 +12263,10 @@ postcss-values-parser@^2.0.0, postcss-values-parser@^2.0.1:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-[email protected].0, "postcss@^7.0.35 || ^8.0.0", postcss@^8.2.15:
-  version "8.3.0"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.3.0.tgz#b1a713f6172ca427e3f05ef1303de8b65683325f"
-  integrity sha512-+ogXpdAjWGa+fdYY5BQ96V/6tAo+TdSSIMP5huJBIygdWwKtVoB5JWZ7yUd4xZ8r+8Kvvx4nyg/PQ071H4UtcQ==
+[email protected].1, "postcss@^7.0.35 || ^8.0.0", postcss@^8.2.15:
+  version "8.3.1"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.3.1.tgz#71f380151c227f83b898294a46481f689f86b70a"
+  integrity sha512-9qH0MGjsSm+fjxOi3GnwViL1otfi7qkj+l/WX5gcRGmZNGsIcqc+A5fBkE6PUobEQK4APqYVaES+B3Uti98TCw==
   dependencies:
     colorette "^1.2.2"
     nanoid "^3.1.23"