add atob polyfill

Author: ele828

package.json

@@ -28,5 +28,8 @@
     "three": "^0.108.0",
     "webpack": "^4.39.1",
     "webpack-cli": "^3.3.6"
+  },
+  "dependencies": {
+    "abab": "^2.0.3"
   }
 }

src/index.js

@@ -1,3 +1,4 @@
+import {atob as _atob} from 'abab';
 import _XMLHttpRequest from './XMLHttpRequest'
 
 export function createScopedThreejs(canvas) {
@@ -21,6 +22,12 @@ export function createScopedThreejs(canvas) {
     removeEventListener: function() {},
     URL: {},
   }
+
+  // eslint-disable-next-line
+  const atob = (a) => {
+    return _atob(a)
+  }
+
   // eslint-disable-next-line
   const XMLHttpRequest = _XMLHttpRequest