Rendering issues in alacritty

[cfoust]

@fiplox experienced strange behavior in alacritty. Their full comment is included below.

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There is some other quirks I found while using it. If you want I will open separate issues, but basically:

1. With alacritty terminal emulator cy does not respect the cursor blinking config. In my alacritty config I set

[cursor.style]
blinking = "Off"
shape = "Underline"

but in cy the cursor is blinking.
2. In alacritty while using neovim I see an annoying blinking for some time, if I understand correctly it is due to writing an output of cy to disk. With kitty it works smoothly. And overall the performance in alacritty is worse then in kitty for some reason.

P.S. Thanks for this awesome project!

Originally posted by @fiplox in #10 (comment)