Fix 'double event' on windows crossterm read

[barafael]

Fixes #26. Can be observed via cargo run --example input on windows.

[Lutetium-Vanadium]

Hi, thanks for the PR! The change overall looks good, but I have a few questions regarding it that I can't test since I don't have a windows system.

1. What is the KeyEventKind for the starting newline character?
2. Does this change work with holding down a key? Reading the documentation it seems like a repeat event should be released for this case, but it may differ for windows.

[barafael]

1. The initial "newline" character looks like it is the release event of the enter keypress that started the program. If I hold Enter (not releasing it), I get repeated "Press" -> "Release" events, but no "Repeat" events.
2. This is true for other keys as well - i never seem to get a repeat event from crossterm. I'm using the crossterm event-read example for testing this. Note I'm not getting repeat events on linux either. On Linux, I didn't see any repeat or release events.

[Lutetium-Vanadium]

Ok, since the newline is a release event can we add the repeat event to the conditon. This is closest to the original code while fixing the bug, and there may be some combination of terminal emulator and operating system that returns repeat.

[barafael]

it is done