Bump crossterm from 0.19.0 to 0.21.0

[dependabot]

Bumps crossterm from 0.19.0 to 0.21.0.

Release notes

Sourced from crossterm's releases.

0.20

• Update from signal-hook with 'mio-feature flag' to signal-hook-mio 0.2.1.
• Manually implements Eq, PartialEq and Hash for KeyEvent improving equality checks and hash calculation.
• crossterm::ErrorKind to io::Error.
• Added Cursor Shape Support.
• Add support for function keys F13...F20.
• Support taking any Display in SetTitle command.
• Remove lazy_static dependency.
• Remove extra Clone bounds in the style module.
• Add MoveToRow command.
• Remove writer parameter from execute_winapi

Changelog

Sourced from crossterm's changelog.

Version 0.21

• Expose is_raw function.
• Add 'purge' option on unix system, this clears the entire screen buffer.
• Improve serialisation for color enum values.

Version 0.20

• Update from signal-hook with 'mio-feature flag' to signal-hook-mio 0.2.1.
• Manually implements Eq, PartialEq and Hash for KeyEvent improving equality checks and hash calculation.
• crossterm::ErrorKind to io::Error.
• Added Cursor Shape Support.
• Add support for function keys F13...F20.
• Support taking any Display in SetTitle command.
• Remove lazy_static dependency.
• Remove extra Clone bounds in the style module.
• Add MoveToRow command.
• Remove writer parameter from execute_winapi

Version 0.19

• Use single thread for async event reader.
• Patch timeout handling for event polling this was not working correctly.
• Add unix support for more key combinations mainly complex ones with ALT/SHIFT/CTRL.
• Derive PartialEq and Eq for ContentStyle
• Fix windows resize event size, this used to be the buffer size but is screen size now.
• Change Command::ansi_code to Command::write_ansi, this way the ansi code will be written to given formatter.

Version 0.18.2

• Fix panic when only setting bold and redirecting stdout.
• Use tty_fd for set/get terminal attributes

Version 0.18.1

• Fix enabling ANSI support when stdout is redirected
• Update crossterm-winapi to 0.6.2

Version 0.18.0

• Fix get position bug
• Fix windows 8 or lower write to user-given stdout instead of stdout.
• Make MoveCursor(Left/Right/Up/Dow) command with input 0 not move.
• Switch to futures-core to reduce dependencies.
• Command API restricts to only accept std::io::Write
• Make supports_ansi public
• Implement ALT + numbers windows systems.

Version 0.17.7

• Fix cursor position retrieval bug linux.

Version 0.17.6

• Add functionality to retrieve color based on passed ansi code.
• Switch from 'futures' to 'futures-util' crate to reduce dependency count
• Mio 0.7 update
• signal-hook update

... (truncated)

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