Replaced polyfills with @babel/polyfill

Author: JamesMessinger

.eslintrc.yml

@@ -11,10 +11,6 @@ extends:
   - modular/node
   - modular/es6
 
-globals:
-  Promise: false
-  Symbol: false
-
 rules:
   # This rule erroneously flags functions that use the `arguments` object
   no-unused-vars: off

package.json

@@ -57,6 +57,7 @@
     "start": "http-server -c-1 -o http://localhost:8080/test/"
   },
   "devDependencies": {
+    "@babel/polyfill": "^7.4.4",
     "@types/json-schema": "^7.0.1",
     "@types/node": "^11.9.4",
     "chai": "^4.2.0",