Module v0_9_0_rc4

Fixed

• Remove accidentally exposed TryFrom<tokio::process::ChildStdin implementation for ChildStdin.
• Remove accidentally exposed TryFrom<tokio_pipe::PipeWrite> implementation for ChildStdin.
• Remove accidentally exposed TryFrom<tokio::process::ChildStdout> implementation for ChildStdout.
• Remove accidentally exposed TryFrom<tokio_pipe::PipeRead> implementation for ChildStdout.
• Remove accidentally exposed TryFrom<tokio::process::ChildStderr> implementation for ChildStderr.
• Remove accidentally exposed TryFrom<tokio_pipe::PipeRead> implementation for ChildStderr.

Changed

• Make Session::check available only on unix.
• Make Socket::UnixSocket available only on unix.
• Make SessionBuilder::control_directory available only on unix.