Update dependency eslint-config-prettier to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-config-prettier	^7.2.0 -> ^9.1.0

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Release Notes

prettier/eslint-config-prettier (eslint-config-prettier)

v9.1.0

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• Added: [unicorn/template-indent], (as a [special rule][unicorn/template-indent-special]). Thanks to Gürgün Dayıoğlu (@​gurgunday)!
• Changed: All the [formatting rules that were deprecated in ESLint 8.53.0][deprecated-8.53.0] are now excluded if you set the ESLINT_CONFIG_PRETTIER_NO_DEPRECATED environment variable.

v9.0.0

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• Added: The CLI helper tool now works with eslint.config.js (flat config). Just like ESLint itself, the CLI tool automatically first tries eslint.config.js and then eslintrc, and you can force which one to use by setting the [ESLINT_USE_FLAT_CONFIG] environment variable. Note that the config of eslint-config-prettier has always been compatible with eslint.config.js (flat config) – it was just the CLI tool that needed updating. On top of that, the docs have been updated to mention how to use both eslint.config.js (flat config) and eslintrc, and the tests now test both config systems.
• Changed: [unicode-bom] is no longer turned off. Prettier preserves the BOM if you have one, and does not add one if missing. It was wrong of eslint-config-prettier to disable that rule. If you get ESLint errors after upgrading, either add "unicode-bom": "off" to your config to disable it again, or run ESLint with --fix to fix all files according to the rule (add or remove BOM). Thanks to Nicolas Stepien (@​nstepien)!

v8.10.0

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• Added: [max-statements-per-line]. Thanks to @​Zamiell!

v8.9.0

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• Added: [vue/array-element-newline]. Thanks to @​xcatliu!

v8.8.0

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• Added: [@​typescript-eslint/lines-around-comment]. Thanks to @​ttionya!

v8.7.0

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• Added: [@​typescript-eslint/block-spacing]. Thanks to @​ttionya!
• Added: [@​typescript-eslint/key-spacing]. Thanks to @​ttionya!

v8.6.0

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• Added: [vue/multiline-ternary]. Thanks to @​xcatliu!

v8.5.0

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• Added: [@​typescript-eslint/space-before-blocks]. Thanks to Masafumi Koba (@​ybiquitous)!

v8.4.0

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• Added: [vue/quote-props]. Thanks to @​xcatliu!

v8.3.0

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• Added: Support for [@​babel/eslint-plugin]. Thanks to Chip Zhang (@​ChipZhang) for the heads-up! ([eslint-plugin-babel] is still supported, too.)

v8.2.0

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• Added: [flowtype/quotes]. Thanks to Martin Zlámal (@​mrtnzlml)!

v8.1.0

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• Added: [flowtype/object-type-curly-spacing].
• Added: Dummy files for the configs removed in 8.0.0. The dummy files throw an error that try to guide you how to upgrade.

v8.0.0

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• Changed: All configs have been merged into one!

  To upgrade, change:

  {
    "extends": [
      "some-other-config-you-use",
      "prettier",
      "prettier/@​typescript-eslint",
      "prettier/babel",
      "prettier/flowtype",
      "prettier/react",
      "prettier/standard",
      "prettier/unicorn",
      "prettier/vue"
    ]
  }

  Into:

  {
    "extends": [
      "some-other-config-you-use",
      "prettier"
    ]
  }

  The "prettier" config now includes not just ESLint core rules, but also rules from all plugins. Much simpler!

  So … what’s the catch? Why haven’t we done this earlier? Turns out it’s just a sad mistake. I (@​lydell) was confused when testing, and thought that turning off unknown rules in a config was an error. Thanks to Georgii Dolzhykov (@​thorn0) for pointing this out!

  If you use [eslint-plugin-prettier], all you need is [plugin:prettier/recommended]:

  {
    "extends": [
      "some-other-config-you-use",
      "plugin:prettier/recommended"
    ]
  }

  (The ["prettier/prettier" config][prettier-prettier-config] still exists separately. It’s the odd one out. The main "prettier" config does not include the rules from it.)

• Changed: The CLI helper tool now only prints warnings for [arrow-body-style] and [prefer-arrow-callback], just like other “special rules.” This means that if you’ve decided to use those rules and [eslint-plugin-prettier] at the same time, you’ll get warnings but exit code zero (success).

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