Merge pull request #1393 from hypothesis/add-ie11-sentry-polyfills

Add ES2015 polyfills required by new Sentry SDK

src/shared/polyfills/es2015.js

@@ -3,6 +3,7 @@
 // ES2015
 require('core-js/es6/promise');
 require('core-js/es6/map');
+require('core-js/es6/number');
 require('core-js/es6/set');
 require('core-js/es6/symbol');
 require('core-js/fn/array/fill');
@@ -10,5 +11,6 @@ require('core-js/fn/array/find');
 require('core-js/fn/array/find-index');
 require('core-js/fn/array/from');
 require('core-js/fn/object/assign');
+require('core-js/fn/string/includes');
 require('core-js/fn/string/ends-with');
 require('core-js/fn/string/starts-with');