v0.20.0

This release is way overdue, so glad to finally have it out! It includes a major ESLint upgrade, huge performance improvements, Prettier support, lots of new rules, and bug fixes.

The project was recently moved to a GitHub organization, and we got a new team member, Pierre Vanduynslager ✨

We now also have configs for TypeScript (using tslint) and CSS & Sass (using stylelint). And don't forget, we already have a config for React.

Many of the new rules in this release are from the eslint-plugin-unicorn plugin, which could use some contributions.

Highlights

• Upgraded to ESLint 4. a11e288
• Added optional Prettier support. fd89175
• Improved performance. 552cbb1
• Now toggles rules based on the engines field in package.json. 0d18368
• Disabled linebreak-style rule on Windows. xojs/eslint-config-xo@3f81796
• Made the spaced-comment rule more lenient. xojs/eslint-config-xo@e4f1f36
• Now allows _ as argument name in the no-unused-vars rule. xojs/eslint-config-xo@dda366b
• The --open flag now opens errors first and not warnings. 6f6a606
• Removed deprecated --compact CLI flag. 652a6e5
• Excluded babel-register and babel-polyfill from the no-unassigned-import rule. 70d6ab4
• Sets ecmaVersion to 2018. 9859dfb

New rules

22 new rules!

• semi-style xojs/eslint-config-xo@0b1680e
• for-direction xojs/eslint-config-xo@c957c7f
• switch-colon-spacing xojs/eslint-config-xo@c1c8fc7
• no-buffer-constructor xojs/eslint-config-xo@ee366cb
• getter-return xojs/eslint-config-xo@40e1442
• function-paren-newline xojs/eslint-config-xo@9e90fdc
• lines-between-class-members xojs/eslint-config-xo@c7f63cd
• array-bracket-newline xojs/eslint-config-xo@e2f3748
• unicorn/prefer-add-event-listener
• unicorn/prefer-spread rule
• unicorn/no-unsafe-regex
• unicorn/error-message
• unicorn/import-index
• unicorn/new-for-builtins
• unicorn/regex-shorthand
• unicorn/escape-case
• unicorn/no-hex-escape
• promise/no-return-wrap 4273f8a
• promise/no-return-in-finally 4273f8a
• node/no-unpublished-bin 16fb8e2
• node/process-exit-as-throw 16fb8e2
• node/no-deprecated-api 16fb8e2

All changes

v0.18.2...v0.20.0

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Why is this not 0.19.0? That version got tainted by an incorrect publish a long time ago.