build(deps): bump postcss from 7.0.35 to 7.0.36 in /packages/vant-cli (#8866)

Bumps [postcss](https://github.com/postcss/postcss) from 7.0.35 to 7.0.36.
- [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/7.0.35...7.0.36)

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

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packages/vant-cli/package.json

@@ -77,7 +77,7 @@
     "lodash": "^4.17.21",
     "ora": "^5.4.1",
     "portfinder": "^1.0.28",
-    "postcss": "^7.0.0",
+    "postcss": "^7.0.36",
     "postcss-load-config": "^3.0.1",
     "postcss-loader": "^4.1.0",
     "prettier": "2.3.1",