Update fs4 requirement from 0.13.1 to 1.0.2

[dependabot]

Updates the requirements on fs4 to permit the latest version.

Changelog

Sourced from fs4's changelog.

Releases

1.0.1

Fixes

• Unix allocate: short-circuit on allocated blocks (metadata().blocks() * 512 >= len) instead of logical EOF. The previous metadata().len() >= len check silently turned allocate into a no-op on sparse files (logical length large, zero blocks reserved), violating the documented preallocation guarantee. The new check still skips the macOS F_PREALLOCATE re-allocate-ENOSPC path from #15, since it asks the right question: "are the blocks already reserved?" Applies to both the sync and async implementations.
• Windows statvfs: route the three GetDiskFreeSpaceExW outputs correctly. free_space now comes from lpTotalNumberOfFreeBytes (volume-wide, quota-independent), available_space from lpFreeBytesAvailable (caller-scoped, honours per-user quotas), and total_space is computed from cluster math (sectors_per_cluster * bytes_per_sector * total_number_of_clusters) so it reports volume capacity rather than the caller's quota. On quota-enabled volumes the three fields now carry distinct, documented meanings; previously free_space and available_space were identical and total_space under-reported capacity.
• Added target_os = "fuchsia" to the Unix allocate fallocate branch (sync and async). Fuchsia is cfg(unix) under rustc and rustix exposes fallocate there, so the previous omission left the Fuchsia Unix build without an allocate symbol once FileExt was enabled. With this fix, every fs4 feature builds on Fuchsia except fs-err3 and fs-err3-tokio; those remain blocked on fs-err v3.3.0 referencing std::os::unix::fs::chroot, which rustc gates out on target_os = "fuchsia". The fs4 code no longer has a Fuchsia gap — the remaining one is upstream (andrewhickman/fs-err#90).

Testing

• New regression test allocate_reserves_blocks_on_sparse_file (sync and async, Linux-gated) creates a sparse file via set_len, asserts allocated_size == 0, calls allocate, and asserts blocks are reserved.

Documentation

• README gained a Minimum Supported Rust Version section noting that the crate's declared MSRV (rust-version = "1.75.0") covers the default sync feature, and that async-std / smol inherit a higher effective MSRV (1.85) from their transitive dependencies (async-lock, async-signal).

... (truncated)

Commits

• See full diff 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 show <dependency name> 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]

Superseded by #2919.