alacritty: update from the default config
alacritty: update from the default config

Add Copy/Cut/Paste keys.

This just adds support for the Copy/Cut/Paste keys and sets up
Copy/Paste as alternative defaults for Ctrl+Shift+C/V.

https://github.com/jwilm/alacritty/commit/0f700a01bd73623cdfc0afc4a54f9e82f46d8f49

dikiaap/dotfiles,dikiaap/crispy-tux,dikiaap/crispy-tux