vscode/extensions/javascript/syntaxes

The file JavaScript.tmLanguage.json is derived from TypeScriptReact.tmLanguage.

To update to the latest version:

• cd extensions/typescript and run npm run update-grammars
• don't forget to run the integration tests at ./scripts/test-integration.sh

The script does the following changes:

• fileTypes .tsx -> .js & .jsx
• scopeName scope.tsx -> scope.js
• update all rule names .tsx -> .js