E0022: invalid UTF-8 sequence
JavaScript files are normally encoded using UTF-8. It is an error for a UTF-8 JavaScript file to contain bytes which are not valid UTF-8.
quick-lint-js only supports UTF-8 JavaScript files. UTF-16, ISO-8859-1, and other encodings are not supported by quick-lint-js. Save your file as UTF-8 to check it with quick-lint-js.
Introduced in quick-lint-js version 0.2.0.