Let a user input uppercase characters on Search query

[yykamei]

A user should be able to input uppercase characters on Search query. In the current implementation, such inputs are silently ignored. This behavior is not user-friendly.

thwack/src/cli.rs

Lines 54 to 57 in 227603e

	// TODO: Support uppercase
	if let Event::Key(KeyEvent {
	code: KeyCode::Char(c),
	modifiers: KeyModifiers::NONE,