It appears that the repository has undergone several changes and renamings:

backend/node_modules/any-promise/register-shim.js

@@ -1,18 +0,0 @@
-"use strict";
-module.exports = require('./loader')(window, loadImplementation)
-
-/**
- * Browser specific loadImplementation.  Always uses `window.Promise`
- *
- * To register a custom implementation, must register with `Promise` option.
- */
-function loadImplementation(){
-  if(typeof window.Promise === 'undefined'){
-    throw new Error("any-promise browser requires a polyfill or explicit registration"+
-      " e.g: require('any-promise/register/bluebird')")
-  }
-  return {
-    Promise: window.Promise,
-    implementation: 'window.Promise'
-  }
-}