Compile to es5 to support regular VS

Author: mjbvz

package-lock.json

@@ -20,6 +20,7 @@
     "url": "https://github.com/Microsoft/typescript-styled-plugin/issues"
   },
   "dependencies": {
+    "object.assign": "^4.0.4",
     "typescript-template-language-service-decorator": "0.0.2",
     "vscode-css-languageservice": "^2.1.10",
     "vscode-languageserver-types": "^3.4.0"

package.json

@@ -1,5 +1,6 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
+const assign = require('object.assign').getPolyfill();
 
 export interface TsStyledPluginConfiguration {
     tags: string[];
@@ -16,7 +17,7 @@ export const defaultConfiguration: TsStyledPluginConfiguration = {
 };
 
 export const loadConfiguration = (config: any): TsStyledPluginConfiguration => {
-    const lint = Object.assign({}, defaultConfiguration.lint, config.lint || {});
+    const lint = assign({}, defaultConfiguration.lint, config.lint || {});
     return {
         tags: config.tags || defaultConfiguration.tags,
         validate: typeof config.validate !== 'undefined' ? config.validate : defaultConfiguration.validate,

src/configuration.ts

@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
         "module": "commonjs",
-        "target": "es6",
+        "target": "es5",
         "sourceMap": true,
         "outDir": "lib",
         "rootDir": "src",