[Snyk] Security upgrade next from 13.2.3 to 13.5.4

[JanCizmar]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

#### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - testapps/next/package.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **551/1000**
**Why?** Recently disclosed, Has a fix available, CVSS 5.3 | Improper Input Validation
[SNYK-JS-POSTCSS-5926692](https://snyk.io/vuln/SNYK-JS-POSTCSS-5926692) | No | No Known Exploit (*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: next

The new version differs by 250 commits.

• 1e8dca4 v13.5.4
• 9e24d6f v13.5.4-canary.11
• 281ae41 Fix build output logging order (#56335)
• d7626ff Revert "misc: shortcut styled-jsx in external resolution (#56291)" (#56334)
• db48052 v13.5.4-canary.10
• 7df92b8 test: add flaky turbopack integration tests to manifest (#56309)
• eeb9b33 fix: Invalid URL (404) provided on server actions error (#56323)
• 3172cfe fix: support both decoded and encoded url requests of conventioned files (#56187)
• a2f9ef5 fix(next/client): keep hash when navigating from app to pages router (#56223)
• a970f28 Add code freeze GitHub actions for releasing (#56325)
• 5fbc23e misc: fix instrumentation with bundled server (#56318)
• 98432a4 Remove buildId test as it's no longer relevant (#56316)
• 86274e6 fix(#53190): add missing crossOrigin to assetsPrefix resources (#56311)
• e970e05 Reland static prefetches & fix prefetch bailout behavior (#56228)
• be952fb fix: typo in `with-stripe-typescript` example (#56274)
• 7f60cc8 Support serverRuntimeConfig and publicRuntimeConfig in Turbopack (#56310)
• 8d18ad6 update webp crate (#56307)
• ac95a20 Fix flaky test for size output (#56303)
• dba978f misc: shortcut styled-jsx in external resolution (#56291)
• 458dab8 misc: update code owners (#56290)
• 5254aae Update image.mdx (#56266)
• 0d4859b Update image.mdx (#56269)
• 59bda2d More Turbopack fixes (#56299)
• ecd94c1 misc: enable source maps for bundled runtime (#56289)

See the full diff

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