Downgrade crossterm to 0.25.0

[jessebraham]

Computers were a mistake

(using 0.26.x somehow breaks things on Windows in weird circumstances)

[bjoernQ]

I tried 0.27.0 today and it still gives us problems on Windows.

For the records: One (or probably the) issue is replicated as follows

• create a batch file flashing and monitoring at least two ELF files
• run the batch file
• see the first application running
• press CTRL-C
• next ELF will get flashed fine but monitoring will immediately end

There is a workaround which probably would have even worked in 0.26.x

src\cli\monitor\mod.rs:160

                        KeyCode::Char('c') => {
                            poll(Duration::from_millis(100)).ok();
                            break;
                        },

Apparently since 0.26.0 the event somehow isn't consumed by read() and it reads the same again in the next run. Don't know the details t.b.h.

It's interesting that the event doesn't get picked up during flashing (but I think it's because at that stage it's handled by the ctrlc crate)

With the above change it just polls again and might or might not consume a queued event (CTRL-C)