Bump postcss from 8.4.16 to 8.4.21 (#9569)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.16 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/8.4.16...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

@@ -75,7 +75,7 @@
         "node-fetch": "^2.6.1",
         "npm-run-all": "^4.0.0",
         "osm-community-index": "~5.5.0",
-        "postcss": "^8.1.1",
+        "postcss": "^8.4.21",
         "postcss-selector-prepend": "^0.5.0",
         "shelljs": "^0.8.0",
         "shx": "^0.3.0",
@@ -6921,7 +6921,9 @@
       "license": "ISC"
     },
     "node_modules/postcss": {
-      "version": "8.4.16",
+      "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": [
         {
@@ -6933,7 +6935,6 @@
           "url": "https://tidelift.com/funding/github/npm/postcss"
         }
       ],
-      "license": "MIT",
       "dependencies": {
         "nanoid": "^3.3.4",
         "picocolors": "^1.0.0",
@@ -14136,7 +14137,9 @@
       }
     },
     "postcss": {
-      "version": "8.4.16",
+      "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

@@ -110,7 +110,7 @@
     "node-fetch": "^2.6.1",
     "npm-run-all": "^4.0.0",
     "osm-community-index": "~5.5.0",
-    "postcss": "^8.1.1",
+    "postcss": "^8.4.21",
     "postcss-selector-prepend": "^0.5.0",
     "shelljs": "^0.8.0",
     "shx": "^0.3.0",