fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727
- https://snyk.io/vuln/SNYK-JS-MICROMATCH-6838728
- https://snyk.io/vuln/SNYK-JS-NANOID-8492085

package.json

@@ -85,7 +85,7 @@
     "object.values": "^1.1.5",
     "path-complete-extname": "^1.0.0",
     "pg": "^8.5.0",
-    "postcss": "^8.4.18",
+    "postcss": "^8.5.0",
     "postcss-loader": "^3.0.0",
     "postcss-object-fit-images": "^1.1.2",
     "promise.prototype.finally": "^3.1.3",
@@ -160,7 +160,7 @@
     "raf": "^3.4.1",
     "react-intl-translations-manager": "^5.0.3",
     "react-test-renderer": "^16.14.0",
-    "stylelint": "^14.14.0",
+    "stylelint": "^16.13.0",
     "stylelint-config-standard-scss": "^5.0.0",
     "webpack-dev-server": "^3.11.3",
     "yargs": "^17.6.0"