build(deps): bump postcss-preset-env from 7.7.0 to 7.7.1 (#865)

* build(deps): bump postcss-preset-env from 7.7.0 to 7.7.1

Bumps [postcss-preset-env](https://github.com/csstools/postcss-plugins/tree/HEAD/plugin-packs/postcss-preset-env) from 7.7.0 to 7.7.1.
- [Release notes](https://github.com/csstools/postcss-plugins/releases)
- [Changelog](https://github.com/csstools/postcss-plugins/blob/main/plugin-packs/postcss-preset-env/CHANGELOG.md)
- [Commits](https://github.com/csstools/postcss-plugins/commits/HEAD/plugin-packs/postcss-preset-env)

---
updated-dependencies:
- dependency-name: postcss-preset-env
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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* [dependabot skip] Fix yarn.lock

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package.json

@@ -74,7 +74,7 @@
         "postcss-flexbugs-fixes": "^5.0.2",
         "postcss-loader": "^7.0.0",
         "postcss-normalize": "^10.0.1",
-        "postcss-preset-env": "^7.7.0",
+        "postcss-preset-env": "^7.7.1",
         "prompts": "^2.4.2",
         "prop-types": "^15.8.1",
         "react": "^16.13.1",