Enable Progress Bar

[casey]

Currently, forcing the progress bar to display with command.env("CARGO_TERM_PROGRESS_WHEN", "always") doesn't look right due to rust-lang/cargo#9155. This merged PR fixes it, but hasn't made it into a release.

Once it does, we should force the progress bar on with:

if let Some((width, _height)) = term_size::dimensions() {
  command
    .env("CARGO_TERM_PROGRESS_WHEN", "always")
    .env("CARGO_TERM_PROGRESS_WIDTH", &width.to_string());
}