update vscode-nls-dev to fixed version, share more config between extensions

extensions/typescript-language-features/extension.webpack.config.js

@@ -8,7 +8,6 @@
 'use strict';
 
 const withDefaults = require('../shared.webpack.config');
-const CopyWebpackPlugin = require('copy-webpack-plugin');
 
 module.exports = withDefaults({
 	context: __dirname,
@@ -20,10 +19,5 @@ module.exports = withDefaults({
 	},
 	entry: {
 		extension: './src/extension.ts',
-	},
-	plugins: [
-		new CopyWebpackPlugin([
-			{ from: './out/nls.*.json', to: '[name].json' }
-		])
-	]
+	}
 });