sysutils/eza: Update to 0.18.0

ChangeLog: https://github.com/eza-community/eza/releases/tag/v0.18.0

Features

• [breaking] Add --classify=always,auto,never

Miscellaneous Tasks

• Remove rustfmt config file that has a nightly only option in favor of rustfmt skip directive which is already in place
• Fix small typo in pull request template
• Release eza v0.18.0

Refactor

• Change cast to coertion, remove rustfmt skip and clippy lint ignore directives

PR: 276829
Reported by: kdeguchi@sz.tokoha-u.ac.jp (maintainer)

(cherry picked from commit 38ee7be0a7bc5d57b81ad5834ab947e301a2a514)