build(deps-dev): bump react-scripts from 3.2.0 to 3.4.0

Bumps [react-scripts](https://github.com/facebook/create-react-app/tree/HEAD/packages/react-scripts) from 3.2.0 to 3.4.0.
- [Release notes](https://github.com/facebook/create-react-app/releases)
- [Changelog](https://github.com/facebook/create-react-app/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/create-react-app/commits/react-scripts@3.4.0/packages/react-scripts)

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

packages/cockpit/ui/.env

@@ -1,2 +1,3 @@
 BROWSER=none
+PUBLIC_URL=/
 SKIP_PREFLIGHT_CHECK=true

packages/cockpit/ui/package.json

@@ -91,7 +91,7 @@
     "react-redux": "5.1.1",
     "react-router": "4.3.1",
     "react-router-dom": "4.3.1",
-    "react-scripts": "3.2.0",
+    "react-scripts": "3.4.0",
     "react-sortable-hoc": "1.8.3",
     "react-treebeard": "3.2.4",
     "reactstrap": "6.5.0",

site/yarn.lock

@@ -726,9 +726,9 @@ camelcase@^3.0.0:
   integrity sha1-MvxLn82vhF/N9+c7uXysImHwqwo=
 
 caniuse-lite@^1.0.30000929, caniuse-lite@^1.0.30000938:
-  version "1.0.30000938"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000938.tgz#b64bf1427438df40183fce910fe24e34feda7a3f"
-  integrity sha512-ekW8NQ3/FvokviDxhdKLZZAx7PptXNwxKgXtnR5y+PR3hckwuP3yJ1Ir+4/c97dsHNqtAyfKUGdw8P4EYzBNgw==
+  version "1.0.30001032"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001032.tgz#b8d224914e2cd7f507085583d4e38144c652bce4"
+  integrity sha512-8joOm7BwcpEN4BfVHtfh0hBXSAPVYk+eUIcNntGtMkUWy/6AKRCDZINCLe3kB1vHhT2vBxBF85Hh9VlPXi/qjA==
 
 caseless@~0.12.0:
   version "0.12.0"