Sync updater: beautify-tests.js -> beautify-javascript-tests.js + beautify-css-tests.js
[sync] Add css test generation
https://github.com/beautify-web/js-beautify/commit/d40e024a965a56420a201a9b8d14374a66f55dfe
Sync runTests(): run_beautifier_tests() -> run_javascript_tests() + run_css_tests()