* gnu/packages/crates-io.scm (rust-alacritty-terminal-0.15): Rename to
rust-alacritty-terminal-0.18. Update to 0.18.0.
[arguments]: Don't skip the build.
[cargo-inputs]: Add rust-alacritty-config-0.1, rust-signal-hook-mio-0.2,
rust-windows-sys-0.36. Replace rust-alacritty-config-derive-0.1 with
0.2, rust-dirs-2 with 4, rust-nix-0.23 with 0.24, rust-parking-lot-0.11
with 0.12, rust-signal-hook-0.1 with 0.3. Remove rust-winapi-0.3.
[cargo-development-inputs]: Add rust-serde-json-1.
fd08ef3077