Update async-fs requirement from 1.5.0 to 2.1.0

[dependabot[bot]]

Updates the requirements on async-fs to permit the latest version.

Release notes

Sourced from async-fs's releases.

v2.1.0

• Bump async-lock and futures-lite to their latest versions. (#27, #28)

Changelog

Sourced from async-fs's changelog.

Version 2.1.0

• Bump async-lock and futures-lite to their latest versions. (#27, #28)

Version 2.0.0

• Breaking: Seal extension traits. (#20)
• Breaking: Remove unsafe implementations of the FromRawFd/FromRawHandle traits. (#26)
• Avoid using a build.rs script for feature autodetection. (#17)
• Remove the autocfg dependency. (#18)
• Avoid a heap allocation in the ReadDir implementation. (#23)

Version 1.6.0

• Implement I/O safety traits on Rust 1.63+ (#13)

Version 1.5.0

• Replace &mut self with &self on the following methods:
  • File::sync_data()
  • File::sync_all()
  • File::set_len()

Version 1.4.0

• Define new extension traits instead of implementing those from std.

Version 1.3.0

• Implement FromRawFd/FromRawHandle for File.
• Implement OpenOptionsExt for OpenOptions on Windows.
• Re-export some extension traits into OS-specific modules.

Version 1.2.1

• Optimization: Don't flush if the file is already flushed.

Version 1.2.0

• Update blocking to v1.0

Version 1.1.2

• Do not reposition the cursor if the file is not seekable.

Version 1.1.1

• Update dependencies.

Version 1.1.0

... (truncated)

Commits

• 2446bcc v2.1.0
• 5b6ef1b Update async-lock requirement from 2.3.0 to 3.0.0
• 3c0f997 Update futures-lite requirement from 1.2.0 to 2.0.0
• c8ecbc4 v2.0.0
• 23af470 breaking: Remove FromRawFd/Handle implementations
• c971597 opt: Use blocking::Task instead of boxing unblock()
• de5105b Replace winapi with windows-sys in doctest (#21)
• e6ec6e0 Update actions/checkout action to v4
• fa51b29 m: Seal extension traits
• 8ab8ed3 Add smol-rs logo (#19)
• Additional commits viewable in compare view

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