Replace termion with crossterm

[jtschuster]

This isolates the changes from #280 that are related to crossterm.

@cantino Hopefully this makes it easier to review and test yourself, and PowerShell/Windows support can be added separately.

[cantino]

Is this ready for testing @jtschuster?

[jtschuster]

@cantino Sorry for the delay, it should be ready to look at now.

[cantino]

I get

 $ thread 'main' panicked at 'McFly error: failed to read input IoError(Custom { kind: Other, error: "Failed to initialize input reader" })', src/interface.rs:413:43
 git st                                             note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace                                                                                           2h 11m

On my Mac when I run this.

[jtschuster]

It looks like there is a known issue with crossterm on mac when /dev/tty is used instead of stdin. Since it looks like zsh's zle uses the tty, that seems to be causing issues. It's working for me on linux with bash and zsh, and mac with bash, but not zsh.
There's a couple PR's looking to address the issue, one stale and one new:
crossterm-rs/crossterm#407
crossterm-rs/crossterm#711

[jtschuster]

I've also just set the crossterm dependency to reference the in-progress pr crossterm-rs/crossterm#711 instead of the released version and it seems to work in zsh on mac now (at least doesn't panic).

[jtschuster]

@cantino Sorry for letting this get stale, but it should be ready to take another look at now. The crashing on zsh issue was fixed in crossterm v0.26, and it seems to be working for me. Please take a look when you can.

[cantino]

Thank you for your hard work on this @jtschuster. Have you been using this personally without issue?

I've tested on fish, zsh, and bash on my mac and zsh on Ubuntu. Seems to work great!

Minor: The highlight color is a bit hard to read on my Mac on iTerm2:

Is now a good time to allow color customization?

[jtschuster]

Thank you for your hard work on this @jtschuster. Have you been using this personally without issue?

I use windows primarily, but I've been using #280 without issues so far, and haven't hit issues testing this branch yet.

Minor: The highlight color is a bit hard to read on my Mac on iTerm2:

I just pushed a commit that changes the highlight color to DarkGreen and it's much more readable.

Is now a good time to allow color customization?

I wouldn't want to add too much to this PR, but it should be easy to rebase #156 once this is in.

[cantino]

Makes sense!

In light mode, the text you've typed isn't visible when selected:

While it is visible in dark mode:

And it is on master:

[jtschuster]

Good catch! I've pushed a commit that makes it match the behavior in master.

[praveenperera]

Thanks for the or @jtschuster, i’m going to test this out locally tomorrow. For now would you find fixing the last clippy warnings?

[praveenperera]

@jtschuster @cantino I've been using this branch, its been good

edit: please run cargo fmt

[cantino]

One more merge and I think we're good to go on this.

[cantino]

Thanks @jtschuster! Awesome work.

[cantino]

Released in v0.8.0.