[javascript] update grammar, grammar as JSON

extensions/javascript/OSSREADME.json

@@ -5,7 +5,7 @@
 	"version": "0.0.1",
 	"license": "Apache2",
 	"repositoryURL": "https://github.com/Microsoft/TypeScript-TmLanguage",
-	"description": "The file syntaxes/JavaScript.tmLanguage was derived from TypeScriptReact.tmLanguage in https://github.com/Microsoft/TypeScript-TmLanguage.",
+	"description": "The file syntaxes/JavaScript.tmLanguage.json was derived from TypeScriptReact.tmLanguage in https://github.com/Microsoft/TypeScript-TmLanguage.",
 	"licenseDetail": [
 		// Reason: LICENSE file does not include Copyright statement
 		"Copyright (c) Microsoft Corporation.  All rights reserved.",

extensions/javascript/package.json

@@ -54,12 +54,12 @@
 			{
 				"language": "javascriptreact",
 				"scopeName": "source.js",
-				"path": "./syntaxes/JavaScript.tmLanguage"
+				"path": "./syntaxes/JavaScript.tmLanguage.json"
 			},
 			{
 				"language": "javascript",
 				"scopeName": "source.js",
-				"path": "./syntaxes/JavaScript.tmLanguage"
+				"path": "./syntaxes/JavaScript.tmLanguage.json"
 			},
 			{
 				"scopeName": "source.js.regexp",

extensions/javascript/syntaxes/Readme.md

@@ -1,6 +1,10 @@
-The JavaScript.tmLanguage bundle is derived from the TypeScriptReact.tmLanguage.
+The file `JavaScript.tmLanguage.json` is derived from [TypeScriptReact.tmLanguage](https://github.com/Microsoft/TypeScript-TmLanguage/blob/master/TypeScriptReact.tmLanguage).
 
-Changes:
-- fileTypes .tsx -> .js
+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 language name and file types
+- update all rule names .tsx -> .js