chore: fix table example

Third column in table example was using the `Max` constraint.

But since version 0.16, the layout system does not add a hidden constraint on the last column which would ensure that it fills the remaining available space (a change that was already mentioned in #525). In addition, `tui` does not support sizing based on content because of its immediate mode nature. Therefore, `Max` is now resolved to `0`. Replacing with `Min` fixes the issue.

A new way of specifying constraints is being worked on at #519 which should for more deterministic and advanced layout.

examples/table.rs

@@ -149,7 +149,7 @@ fn ui<B: Backend>(f: &mut Frame<B>, app: &mut App) {
         .widths(&[
             Constraint::Percentage(50),
             Constraint::Length(30),
-            Constraint::Max(10),
+            Constraint::Min(10),
         ]);
     f.render_stateful_widget(t, rects[0], &mut app.state);
 }