v0.4.2

• add a little bit of logging
• indicate that the username arg is case sensitive
• add some logging for generating codes
• forbid duplicate accounts
• fix full release script so that version bumps are actually respected
• fix a bug that would prevent tui::prompt_char prompts from flushing the prompt
• fix a bug that would prevent tui::prompt_char prompts from accepting the lowercase version of the default answer