Function update 

pub fn update(
    app_config: &AppConfig,
    repo_name: &Option<String>,
    quiet: bool,
    verbose: bool,
    force: bool,
) -> Result<()>

Update dotfiles from git repository and deploy. If repo is specified, update only specified repo. If repo is not specified, update all repos.

Arguments

• repo - repository name
• quiet - quiet mode
• verbose - verbose mode