Bump postcss from 8.4.14 to 8.4.31 in /DEATH IN SPACE

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.14 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.14...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
...

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

DEATH IN SPACE/package.json

@@ -24,7 +24,7 @@
     "@anduh/pug-cli": "^1.0.0-alpha8",
     "autoprefixer": "^10.4.7",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.4.14",
+    "postcss": "^8.4.31",
     "postcss-cli": "^10.0.0",
     "prettier": "^2.7.1",
     "pug": "^3.0.2",