Bump postcss from 8.3.2 to 8.3.4

Bumps [postcss](https://github.com/postcss/postcss) from 8.3.2 to 8.3.4.
- [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/8.3.2...8.3.4)

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

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

package-lock.json

@@ -9539,9 +9539,9 @@
             "dev": true
         },
         "postcss": {
-            "version": "8.3.2",
-            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.2.tgz",
-            "integrity": "sha512-y1FK/AWdZlBF5lusS5j5l4/vF67+vQZt1SXPVJ32y1kRGDQyrs1zk32hG1cInRTu14P0V+orPz+ifwW/7rR4bg==",
+            "version": "8.3.4",
+            "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.4.tgz",
+            "integrity": "sha512-/tZY0PXExXXnNhKv3TOvZAOUYRyuqcCbBm2c17YMDK0PlVII3K7/LKdt3ScHL+hhouddjUWi+1sKDf9xXW+8YA==",
             "dev": true,
             "requires": {
                 "colorette": "^1.2.2",

package.json

@@ -70,7 +70,7 @@
         "gulp-typescript": "^6.0.0-alpha.1",
         "gulp-zip": "^5.1.0",
         "merge-stream": "^2.0.0",
-        "postcss": "^8.3.2",
+        "postcss": "^8.3.4",
         "sass": "^1.35.0",
         "terser": "^5.7.0",
         "tsify": "^5.0.4",