Documentation fails to build in crates that depend on interprocess without the tokio feature

[ealmloff]

Describe the bug When you run cargo doc on a crate that depends on interprocess without the tokio feature it fails because the tokio feature is not enabled.

To Reproduce

1. Create an empty crate with this in the cargo.toml:

[dependencies]
interprocess = { version = "1.2.1" }

2. Run cargo doc

Expected behavior The docs successfully build

Screenshots

Additional context This was run on Windows 11.