Merge pull request #597 from cal-smith/ng8

 update core-js for demos

Author: zvonimirfras

.storybook/addons.js

@@ -1,20 +1,4 @@
-import "core-js/es6/symbol";
-import "core-js/es6/object";
-import "core-js/es6/function";
-import "core-js/es6/parse-int";
-import "core-js/es6/parse-float";
-import "core-js/es6/number";
-import "core-js/es6/math";
-import "core-js/es6/string";
-import "core-js/es6/date";
-import "core-js/es6/array";
-import "core-js/es6/regexp";
-import "core-js/es6/map";
-import "core-js/es6/set";
-import "core-js/es6/reflect";
-
-import "core-js/es7/reflect";
-import "zone.js/dist/zone";
+import "./polyfills.js";
 
 import '@storybook/addon-storysource/register';
 import "@storybook/addon-actions/register";

.storybook/config.js

@@ -1,20 +1,4 @@
-import "core-js/es6/symbol";
-import "core-js/es6/object";
-import "core-js/es6/function";
-import "core-js/es6/parse-int";
-import "core-js/es6/parse-float";
-import "core-js/es6/number";
-import "core-js/es6/math";
-import "core-js/es6/string";
-import "core-js/es6/date";
-import "core-js/es6/array";
-import "core-js/es6/regexp";
-import "core-js/es6/map";
-import "core-js/es6/set";
-import "core-js/es6/reflect";
-
-import "core-js/es7/reflect";
-import "zone.js/dist/zone";
+import "./polyfills.js";
 
 import { configure, addDecorator } from "@storybook/angular";
 import { withOptions } from '@storybook/addon-options';

.storybook/polyfills.js

@@ -0,0 +1,3 @@
+import "core-js/es";
+
+import "zone.js/dist/zone";

karma-test-shim.js

@@ -1,7 +1,6 @@
 Error.stackTraceLimit = Infinity;
 
-require('core-js/es6');
-require('core-js/es7/reflect');
+require('core-js');
 
 require('zone.js/dist/zone');
 require('zone.js/dist/long-stack-trace-zone');