When `clear` is set to true, bar should be filled before being removed

[albinekb]

Here's an example

as you can see, the progress goes from 0 to 100 instantly (probably due to TTFB and the small file size)

When using clear it would be nice if node-progress made sure that the bar was shown as 100% before removing it.

Thoughts? I could make a PR if you're OK with that 👌