3.1.0 (2024-01-10)

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Added

• quick-lint-js's JSX diagnostics can now be configured via quick-lint-js's JSX
  mode mechanism. New JSX modes are "none", "react", and "auto"
  (default).
• Writing a namespace alias with import type, such as in
  import type ns = otherns;, now reports E0717 ("namespace alias cannot
  use 'import type'"). (Implemented by koopiehoop.) (#1139)
• x?.y.z now reports E0718 ("using a '.' after a '?.' might fail, since
  '?.' might return 'undefined'"). (Implemented by Joshua Pepple.)
  (#1128)
• for await (...) now reports E0162 ("'await' is only allowed in async
  functions") when written in a non-async function. (Implemented by Daniel La
  Rocque.) (#1168)

Fixed

• quick-lint-js's tracing no longer crashes with an assertion failure when
  setting its thread name on FreeBSD. (#1155)
• React-specific JSX diagnostics, such as E0193 ("misspelled React
  attribute; write 'className' instead"), are now only reported when 'react' is
  imported and if 'preact' is not imported. This fixes false warnings in Preact
  code. (#1152)
• Commas are now allowed after methods in interfaces in .d.ts files. (They
  were previously only allowed in .ts files.) (#1171)
• quick-lint-js no longer reports warnings for web types such as HeadersInit
  in TypeScript code. (#1180)