No Mutex in `sync` error when using `interprocess` v1.2.1 with Tokio support

[seanballais]

Describe the bug Whenever I build with interprocess (1.2.1) as a dependency without even using the dependency anywhere in the code, I get the following error:

   Compiling tokio v1.36.0
   Compiling interprocess v1.2.1
error[E0432]: unresolved import `tokio::sync::Mutex`
  --> C:\Apps\Rust\cargo\registry\src\index.crates.io-6f17d22bba15001f\interprocess-1.2.1\src\os\windows\named_pipe\tokio\listener.rs:16:5
   |
16 |     tokio::sync::Mutex,
   |     ^^^^^^^^^^^^^^^^^^ no `Mutex` in `sync`
   |
   = help: consider importing one of these items instead:
           spinning::Mutex
           std::sync::Mutex

error[E0603]: module `sync` is private
   --> C:\Apps\Rust\cargo\registry\src\index.crates.io-6f17d22bba15001f\interprocess-1.2.1\src\os\windows\named_pipe\tokio\listener.rs:16:12
    |
16  |     tokio::sync::Mutex,
    |            ^^^^ private module
    |
note: the module `sync` is defined here
   --> C:\Apps\Rust\cargo\registry\src\index.crates.io-6f17d22bba15001f\tokio-1.36.0\src\lib.rs:540:5
    |
540 |     mod sync;
    |     ^^^^^^^^

Some errors have detailed explanations: E0432, E0603.
For more information about an error, try `rustc --explain E0432`.
error: could not compile `interprocess` (lib) due to 2 previous errors

To Reproduce Simply add the following line in Cargo.toml and build:

interprocess = { version = "1.2.1", features = ["tokio_support"] }

Expected behavior I expected the code to compile successfully.

Workaround I used the Git repo as the source, and the bug is fixed:

interprocess = { git = "https://github.com/kotauskas/interprocess", branch = "main", features = ["tokio"] }