Bug/1030 Adjust babel config to account for IE11

An attempt at adding IE11 compatibility (`ie >= 11`) while preserving the current requirements (`current node`) and following browserlist [best practices](https://github.com/browserslist/browserslist#best-practices) (`defaults`).

babel.config.js

@@ -3,9 +3,7 @@ module.exports = {
     [
       '@babel/preset-env',
       {
-        targets: {
-          node: 'current'
-        }
+        targets: "defaults, ie >= 11, current node"
       }
     ]
   ]