printer: fix clearing the progress/spinner output

Fore more information checkout:
briandowns/spinner#117 (comment)

internal/printer/printer.go

@@ -133,6 +133,11 @@ func (p *Printer) PrintProgress(message string) func() {
 	s.Start()
 	return func() {
 		s.Stop()
+
+		// NOTE(fatih) the spinner library doesn't clear the line properly,
+		// hence remove it ourselves. This line should be removed once it's
+		// fixed in upstream.  https://github.com/briandowns/spinner/pull/117
+		fmt.Fprint(p.out(), "\r\033[2K")
 	}
 }