chore(deps-dev): bump postcss from 8.4.14 to 8.4.21 (#5025)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.14 to 8.4.21.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.14...8.4.21)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -90,7 +90,7 @@
         "node-sass-package-importer": "^5.3.2",
         "nodemon": "^2.0.19",
         "npm-run-all": "^4.1.5",
-        "postcss": "^8.4.14",
+        "postcss": "^8.4.21",
         "postcss-cli": "^10.0.0",
         "rollup": "^2.79.1",
         "stylelint": "^14.9.1",
@@ -9862,9 +9862,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.4.14",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.14.tgz",
-      "integrity": "sha512-E398TUmfAYFPBSdzgeieK2Y1+1cpdxJx8yXbK/m57nRhKSmk1GB2tO4lbLBtlkfPQTDKfe4Xqv1ASWPpayPEig==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
       "funding": [
         {
@@ -20868,9 +20868,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.4.14",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.14.tgz",
-      "integrity": "sha512-E398TUmfAYFPBSdzgeieK2Y1+1cpdxJx8yXbK/m57nRhKSmk1GB2tO4lbLBtlkfPQTDKfe4Xqv1ASWPpayPEig==",
+      "version": "8.4.21",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
+      "integrity": "sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==",
       "dev": true,
       "requires": {
         "nanoid": "^3.3.4",

package.json

@@ -144,7 +144,7 @@
     "node-sass-package-importer": "^5.3.2",
     "nodemon": "^2.0.19",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.14",
+    "postcss": "^8.4.21",
     "postcss-cli": "^10.0.0",
     "rollup": "^2.79.1",
     "stylelint": "^14.9.1",