Bump eslint to ^9.11.1 and migrate to flat config

[MajorLift]

Explanation

We recently released new versions of our ESLint packages to rely on ESLint 9. This PR bumps all of the ESLint-related packages in this repo to match, and migrates the current ESLint config into the new flat format. It also upgrades Prettier to v3.

References

Closes #4745.

Changelog

(N/A; developer-only change)

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate
• I've prepared draft pull requests for clients and consumer packages to resolve any breaking changes

[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@babel/code-frame@7.26.2	environment	0	33.2 kB	nicolo-ribaudo
npm/@babel/compat-data@7.26.3	None	0	66.5 kB	nicolo-ribaudo
npm/@babel/core@7.26.0	environment, filesystem, unsafe	0	794 kB	nicolo-ribaudo
npm/@babel/generator@7.26.3	None	0	546 kB	nicolo-ribaudo
npm/@babel/helper-compilation-targets@7.25.9	environment	0	53.5 kB	nicolo-ribaudo
npm/@babel/helper-module-imports@7.25.9	None	0	63.7 kB	nicolo-ribaudo
npm/@babel/helper-module-transforms@7.26.0	None	0	161 kB	nicolo-ribaudo
npm/@babel/helper-string-parser@7.25.9	None	0	31.8 kB	nicolo-ribaudo
npm/@babel/helper-validator-identifier@7.25.9	None	0	48.3 kB	nicolo-ribaudo
npm/@babel/helper-validator-option@7.25.9	None	0	11.8 kB	nicolo-ribaudo
npm/@babel/helpers@7.26.0	None	0	863 kB	nicolo-ribaudo
npm/@babel/parser@7.26.3	None	0	1.9 MB	nicolo-ribaudo
npm/@babel/template@7.25.9	Transitive: environment	+1	2.62 MB	nicolo-ribaudo
npm/@babel/traverse@7.26.4	Transitive: environment	+1	716 kB	nicolo-ribaudo
npm/@es-joy/jsdoccomment@0.49.0	None	0	121 kB	brettz9
npm/@eslint-community/eslint-utils@4.4.1	None	+1	410 kB	eslint-community-bot
npm/@eslint-community/regexpp@4.12.1	None	0	473 kB	eslint-community-bot
npm/@eslint/config-array@0.19.1	None	0	315 kB	eslintbot
npm/@eslint/core@0.9.1	None	0	60 kB	eslintbot
npm/@eslint/eslintrc@3.2.0	filesystem, unsafe Transitive: environment	+4	1.45 MB	eslintbot
npm/@eslint/js@9.17.0	None	0	14.9 kB	eslintbot, openjsfoundation
npm/@eslint/object-schema@2.1.5	None	0	57 kB	eslintbot
npm/@eslint/plugin-kit@0.2.4	None	0	77.1 kB	eslintbot
npm/@humanfs/core@0.19.1	None	0	72.7 kB	nzakas
npm/@humanfs/node@0.16.6	None	+1	89.5 kB	nzakas
npm/@humanwhocodes/retry@0.4.1	None	0	64.9 kB	nzakas
npm/@jest/schemas@29.6.3	None	0	6.07 kB	simenb
npm/@metamask/auto-changelog@4.0.0	None	+1	215 kB	metamaskbot
npm/@metamask/create-release-branch@4.0.0	Transitive: environment, filesystem	+2	283 kB	metamaskbot
npm/@metamask/eslint-config-jest@14.0.0	None	0	12.2 kB	metamaskbot
npm/@metamask/eslint-config-nodejs@14.0.0	unsafe	0	98.4 kB	metamaskbot
npm/@metamask/eslint-config-typescript@14.0.0	None	0	22.7 kB	metamaskbot
npm/@metamask/eslint-config@14.0.0	unsafe	+1	307 kB	metamaskbot
npm/@nolyfill/is-core-module@1.0.39	unsafe	0	2.71 kB	sukkaw
npm/@sinclair/typebox@0.27.8	None	0	442 kB	sinclair
npm/@types/doctrine@0.0.9	None	0	8.49 kB	types
npm/@typescript-eslint/eslint-plugin@8.19.1	None	0	2.79 MB	bradzacher, jameshenry
npm/@typescript-eslint/parser@8.19.1	None	0	18.9 kB	bradzacher, jameshenry
npm/@typescript-eslint/scope-manager@8.19.1	None	0	626 kB	bradzacher, jameshenry
npm/@typescript-eslint/type-utils@8.19.1	None	0	127 kB	bradzacher, jameshenry
npm/@typescript-eslint/types@8.19.1	None	0	174 kB	bradzacher, jameshenry
npm/@typescript-eslint/typescript-estree@8.19.1	None	0	594 kB	bradzacher, jameshenry
npm/@typescript-eslint/utils@8.19.1	None	0	288 kB	bradzacher, jameshenry
npm/@typescript-eslint/visitor-keys@8.19.1	None	0	19.6 kB	bradzacher, jameshenry
npm/acorn@8.14.0	None	0	547 kB	marijn
npm/are-docs-informative@0.0.2	None	0	13.6 kB	joshuakgoldberg
npm/browserslist@4.24.4	None	0	64.9 kB	ai
npm/caniuse-lite@1.0.30001690	None	0	2.15 MB	caniuse-lite
npm/comment-parser@1.4.1	None	0	366 kB	yavorskiys
npm/electron-to-chromium@1.5.79	None	0	154 kB	kilianvalkhof
npm/enhanced-resolve@5.18.0	None	0	212 kB	evilebottnawi, jhnns, sokra, ...1 more
npm/es-module-lexer@1.6.0	None	0	91.3 kB	guybedford
npm/escalade@3.2.0	filesystem	0	12.4 kB	lukeed
npm/eslint-compat-utils@0.5.1	filesystem	0	53.1 kB	ota-meshi
npm/eslint-config-prettier@9.1.0	None	0	20.8 kB	lydell
npm/eslint-import-resolver-typescript@3.7.0	None	0	52.6 kB	jounqin
npm/eslint-plugin-es-x@7.8.0	None	0	409 kB	eslint-community-bot
npm/eslint-plugin-import-x@4.6.1	None	+1	790 kB	jounqin
npm/eslint-plugin-jest@28.10.0	None	0	350 kB	aaronabramov, jeysal, jsonp, ...6 more
npm/eslint-plugin-jsdoc@50.6.1	filesystem	+1	2.1 MB	gajus
npm/eslint-plugin-n@17.15.1	None	0	461 kB	eslint-community-bot, weiran.zsd
npm/eslint-plugin-prettier@5.2.1	None	0	34.3 kB	jounqin
npm/eslint-plugin-promise@7.2.1	None	0	96.6 kB	eslint-community-bot
npm/eslint-scope@8.2.0	None	0	152 kB	eslintbot
npm/eslint-visitor-keys@4.2.0	None	0	36.1 kB	eslintbot
npm/eslint@9.17.0	environment Transitive: filesystem	+6	3.42 MB	eslintbot
npm/fast-glob@3.3.3	filesystem	0	98.4 kB	mrmlnc
npm/file-entry-cache@8.0.0	filesystem	0	16 kB	jaredwray
npm/flat-cache@4.0.1	filesystem	0	29.3 kB	jaredwray
npm/get-tsconfig@4.8.1	filesystem	0	105 kB	hirokiosame
npm/is-bun-module@1.3.0	None	0	11.8 kB	sunset_techuila
npm/jsdoc-type-pratt-parser@4.1.0	None	0	245 kB	jsdoc-type-pratt-parser
npm/jsesc@3.1.0	None	0	32.3 kB	mathias
npm/ms@2.1.3	None	0	6.72 kB	styfle
npm/node-releases@2.0.19	None	0	37.2 kB	chicoxyzzy
npm/parse-imports@2.2.1	None	0	39.1 kB	tomeraberbach
npm/picocolors@1.1.1	None	0	6.37 kB	alexeyraspopov
npm/resolve-pkg-maps@1.0.0	None	0	15 kB	hirokiosame
npm/slashes@3.0.12	None	0	26 kB	chrisackerman
npm/stable-hash@0.0.4	None	0	5.46 kB	quietshu
npm/synckit@0.9.2	environment	0	59.8 kB	jounqin
npm/tapable@2.2.1	None	0	46.9 kB	sokra
npm/ts-api-utils@2.0.0	None	0	353 kB	joshuakgoldberg
npm/typescript-eslint@8.19.1	None	0	103 kB	jameshenry
npm/update-browserslist-db@1.1.2	None	0	14.7 kB	ai

🚮 Removed packages: npm/@babel/code-frame@7.24.7, npm/@babel/compat-data@7.25.4, npm/@babel/core@7.25.2, npm/@babel/generator@7.25.5, npm/@babel/helper-compilation-targets@7.25.2, npm/@babel/helper-module-imports@7.24.7, npm/@babel/helper-module-transforms@7.25.2, npm/@babel/helper-string-parser@7.24.8, npm/@babel/helper-validator-identifier@7.24.7, npm/@babel/helper-validator-option@7.24.8, npm/@babel/helpers@7.25.0, npm/@babel/highlight@7.24.7, npm/@babel/parser@7.25.4, npm/@babel/template@7.25.0, npm/@babel/traverse@7.25.4, npm/@es-joy/jsdoccomment@0.36.1, npm/@eslint-community/eslint-utils@4.4.0, npm/@eslint-community/regexpp@4.11.0, npm/@eslint/eslintrc@2.1.4, npm/@eslint/js@8.57.0, npm/@humanwhocodes/config-array@0.11.14, npm/@humanwhocodes/object-schema@2.0.3, npm/@metamask/auto-changelog@3.3.0, npm/@metamask/create-release-branch@3.1.0, npm/@metamask/eslint-config-jest@12.1.0, npm/@metamask/eslint-config-nodejs@12.1.0, npm/@metamask/eslint-config-typescript@12.1.0, npm/@metamask/eslint-config@12.2.0, npm/@types/json5@0.0.29, npm/@typescript-eslint/eslint-plugin@5.62.0, npm/@typescript-eslint/parser@5.62.0, npm/@typescript-eslint/scope-manager@5.62.0, npm/@typescript-eslint/type-utils@5.62.0, npm/@typescript-eslint/types@5.62.0, npm/@typescript-eslint/typescript-estree@5.62.0, npm/@typescript-eslint/utils@5.62.0, npm/@typescript-eslint/visitor-keys@5.62.0, npm/@ungap/structured-clone@1.2.0, npm/acorn@8.12.1, npm/ansi-align@3.0.1, npm/ansi-styles@3.2.1, npm/array-buffer-byte-length@1.0.1, npm/array-includes@3.1.8, npm/array.prototype.flat@1.3.2, npm/arraybuffer.prototype.slice@1.0.3, npm/boxen@7.1.1, npm/browserslist@4.23.3, npm/builtins@5.1.0, npm/caniuse-lite@1.0.30001653, npm/chalk@2.4.2, npm/clone@1.0.4, npm/color-convert@1.9.3, npm/color-name@1.1.3, npm/comlink@4.4.1, npm/comment-parser@1.3.1, npm/common-path-prefix@3.0.0, npm/data-view-buffer@1.0.1, npm/data-view-byte-length@1.0.1, npm/data-view-byte-offset@1.0.0, npm/defaults@1.0.4, npm/electron-to-chromium@1.5.13, npm/es-abstract@1.23.3, npm/es-define-property@1.0.0, npm/es-set-tostringtag@2.0.3, npm/es-shim-unscopables@1.0.2, npm/es-to-primitive@1.2.1, npm/escalade@3.1.2, npm/escape-string-regexp@1.0.5, npm/eslint-config-prettier@8.10.0, npm/eslint-formatter-codeframe@7.32.1, npm/eslint-import-resolver-typescript@2.7.1, npm/eslint-interactive@10.8.0, npm/eslint-module-utils@2.8.2, npm/eslint-plugin-es@4.1.0, npm/eslint-plugin-import@2.26.0, npm/eslint-plugin-jest@27.9.0, npm/eslint-plugin-jsdoc@39.9.1, npm/eslint-plugin-n@15.7.0, npm/eslint-plugin-prettier@4.2.1, npm/eslint-plugin-promise@6.6.0, npm/eslint-scope@5.1.1, npm/eslint-utils@3.0.0, npm/eslint@8.57.0, npm/fast-glob@3.3.2, npm/fast-uri@3.0.1, npm/file-entry-cache@6.0.1, npm/find-cache-dir@4.0.0, npm/flat-cache@3.2.0, npm/function.prototype.name@1.1.6, npm/functions-have-names@1.2.3, npm/get-intrinsic@1.2.4, npm/get-symbol-description@1.0.2, npm/global-dirs@3.0.1, npm/globalthis@1.0.4, npm/globby@11.1.0, npm/gopd@1.0.1, npm/has-bigints@1.0.2, npm/has-flag@3.0.0, npm/has-symbols@1.0.3, npm/has@1.0.4, npm/internal-slot@1.0.7, npm/is-array-buffer@3.0.4, npm/is-bigint@1.0.4, npm/is-boolean-object@1.1.2, npm/is-data-view@1.0.1, npm/is-date-object@1.0.5, npm/is-installed-globally@0.4.0, npm/is-interactive@2.0.0, npm/is-negative-zero@2.0.3, npm/is-number-object@1.0.7, npm/is-path-inside@3.0.3, npm/is-regex@1.1.4, npm/is-string@1.0.7, npm/is-symbol@1.0.4, npm/is-typed-array@1.1.13, npm/is-unicode-supported@1.3.0, npm/is-weakref@1.0.2, npm/isarray@2.0.5, npm/jsdoc-type-pratt-parser@3.1.0, npm/jsesc@2.5.2, npm/lodash.truncate@4.4.2, npm/log-symbols@5.1.0, npm/ms@2.1.2, npm/natural-compare-lite@1.4.0, npm/node-releases@2.0.18, npm/object-inspect@1.13.2, npm/object.assign@4.1.5, npm/object.values@1.2.0, npm/ora@6.3.1, npm/picocolors@1.0.1, npm/regexp.prototype.flags@1.5.2, npm/regexpp@3.2.0, npm/require-from-string@2.0.2, npm/safe-array-concat@1.1.2, npm/safe-regex-test@1.0.3, npm/set-function-name@2.0.2, npm/side-channel@1.0.6, npm/stdin-discarder@0.1.0, npm/string.prototype.trim@1.2.9, npm/string.prototype.trimend@1.0.8, npm/string.prototype.trimstart@1.0.8, npm/supports-color@5.5.0, npm/table@6.8.2, npm/text-table@0.2.0, npm/to-fast-properties@2.0.0, npm/tsconfig-paths@3.15.0, npm/tsutils@3.21.0, npm/typed-array-buffer@1.0.2, npm/typed-array-byte-length@1.0.1, npm/typed-array-byte-offset@1.0.2, npm/typed-array-length@1.0.6, npm/unbox-primitive@1.0.2, npm/update-browserslist-db@1.1.0, npm/wcwidth@1.0.1, npm/which-boxed-primitive@1.0.2

View full report↗︎

[socket-security]

👍 Dependency issues cleared. Learn more about Socket for GitHub ↗︎

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

Ignoring: npm/@nolyfill/is-core-module@1.0.39

View full report↗︎

Next steps

Take a deeper look at the dependency

Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support [AT] socket [DOT] dev.

Remove the package

If you happen to install a dependency that Socket reports as Known Malware you should immediately remove it and select a different dependency. For other alert types, you may may wish to investigate alternative packages or consider if there are other ways to mitigate the specific risk posed by the dependency.

Mark a package as acceptable risk

To ignore an alert, reply with a comment starting with @SocketSecurity ignore followed by a space separated list of ecosystem/package-name@version specifiers. e.g. @SocketSecurity ignore npm/foo@1.0.0 or ignore all packages with @SocketSecurity ignore-all

[mcmire]

Updated to latest stable release of @metamask/eslint-config and friends. The lint pipeline now works but tests are failing.

[mcmire]

@SocketSecurity ignore npm/@nolyfill/is-core-module@1.0.39

This is coming from eslint-import-resolver-typescript, which @metamask/eslint-config-typescript requires. We can't really control this.

[MajorLift]

Everything LGTM! Thanks for getting this to the finish line :)

[mcmire]

Approving on behalf of Jongsun.