v6.0.0

This release contains breaking changes.

Notable changes:

• API changes to be more flexible and more generic;
• move to Rust 2018 edition;
• WASM/WASI support, thanks @john-sharratt.

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The API has changed from:

pub fn read_password() -> Result<String>
pub fn read_password_from_tty(prompt: Option<&str>) -> ::std::io::Result<String>
pub fn read_password_with_reader<T: BufRead>(source: Option<&mut T>) -> Result<String>

pub fn prompt_password_stdout(prompt: &str) -> std::io::Result<String>
pub fn prompt_password_stderr(prompt: &str) -> std::io::Result<String> 

To:

pub fn read_password_from_bufread(reader: &mut impl BufRead) -> std::io::Result<String>
pub fn read_password() -> std::io::Result<String>

pub fn prompt_password_from_bufread(reader: &mut impl BufRead, writer: &mut impl Write, prompt: impl ToString) -> std::io::Result<String>
pub fn prompt_password(prompt: impl ToString) -> std::io::Result<String>

By default, reading and writing is done from/to the TTY instead of stdin/stdout. This is more reliable for most cases. If you need to read or write from/to a different place, the function versions with from_bufread allow you to pass anything you'd like.