Update axum-core requirement from 0.3 to 0.4

[dependabot[bot]]

Updates the requirements on axum-core to permit the latest version.

Release notes

Sourced from axum-core's releases.

axum-core - v0.4.0

• added: Implement IntoResponse for (R,) where R: IntoResponse (#2143)
• fixed: Fix broken docs links (#2164)
• fixed: Clearly document applying DefaultBodyLimit to individual routes (#2157)
• breaking: The following types/traits are no longer generic over the request body (i.e. the B type param has been removed) (#1751 and #1789):
  • FromRequestParts
  • FromRequest
  • RequestExt
• breaking: axum no longer re-exports hyper::Body as that type is removed in hyper 1.0. Instead axum has its own body type at axum_core::body::Body (#1751)

#2143: tokio-rs/axum#2143 #2164: tokio-rs/axum#2164 #2157: tokio-rs/axum#2157

Commits

• b7d14d3 Release axum 0.7 (#2354)
• 15781fe Prepare serve for potentially supporting graceful shutdown (#2357)
• da82e88 Update graceful shutdown example (#2355)
• 1a78e09 Apply changelog changes from 0.6 branch to main (#2353)
• 906f803 Update changelog (#2349)
• fc3cb44 Upgrade headers to 0.4.0 (#2351)
• a9ac524 Only enable hyper dependency when needed (#2350)
• e3d34bb axum-extra: Use impl Into<Cookie> (#2348)
• 2402d46 Add handle_error to ServiceExt (#2235)
• 4d681de Clean up Q&A discussion template (#2342)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot[bot]]

Looks like axum-core is no longer a dependency, so this is no longer needed.