Bump postcss from 8.1.4 to 8.1.6 (#32113)

Bumps [postcss](https://github.com/postcss/postcss) from 8.1.4 to 8.1.6.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.1.4...8.1.6)

Signed-off-by: dependabot[bot] <support@github.com>

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

package-lock.json

@@ -8277,14 +8277,14 @@
       "optional": true
     },
     "postcss": {
-      "version": "8.1.4",
+      "version": "8.1.6",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.1.4.tgz",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.1.6.tgz",
-      "integrity": "sha512-LfqcwgMq9LOd8pX7K2+r2HPitlIGC5p6PoZhVELlqhh2YGDVcXKpkCseqan73Hrdik6nBd2OvoDPUaP/oMj9hQ==",
+      "integrity": "sha512-JuifSl4h8dJ70SiMXKjzCxhalE6p2TnMHuq9G8ftyXj2jg6SXzqCsEuxMj9RkmJoO5D+Z9YrWunNkxqpRT02qg==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.1",
         "line-column": "^1.0.2",
-        "nanoid": "^3.1.15",
+        "nanoid": "^3.1.16",
         "source-map": "^0.6.1"
       },
       "dependencies": {

package.json

@@ -126,7 +126,7 @@
     "nodemon": "^2.0.6",
     "npm-run-all": "^4.1.5",
     "popper.js": "^1.16.1",
-    "postcss": "^8.1.4",
+    "postcss": "^8.1.6",
     "postcss-cli": "^8.2.0",
     "rollup": "^2.33.1",
     "rollup-plugin-istanbul": "^2.0.1",