Version 0.4.0

Minor

• Throw an error if the eslint peer dependency is not a project dev dependency.
• New browser project setup:
  • Use eslint-plugin-compat.
  • env.browser is now automatically set.
• Support Next.js projects:
  • parserOptions.sourceType is module, as Next.js only supports ESM in .js files. Once Next.js updates to webpack >= 4 this will be reverted and .mjs should be used for ESM source files instead.
  • Disabled the react/react-in-jsx-scope rule, as Next.js uses babel-plugin-react-require.
• Rules preferring modern ES syntax only apply if the syntax is supported:
  • For Babel projects, support is assumed.
  • For non-Babel browser projects, no support is assumed.
  • For non-Babel Node.js projects, support for each syntax is determined against the package.json engines.node field (now documented as required for all projects).

Patch

• Updated dependencies.
• Fixed React installation instructions.
• Ensure the node/no-unsupported-features rule is also off in .mjs files for Babel projects.