Fix.

node_modules/es-abstract/index.js

@@ -1,24 +0,0 @@
-'use strict';
-
-var assign = require('./helpers/assign');
-
-var ES5 = require('./es5');
-var ES2015 = require('./es2015');
-var ES2016 = require('./es2016');
-var ES2017 = require('./es2017');
-var ES2018 = require('./es2018');
-
-var ES = {
-	ES5: ES5,
-	ES6: ES2015,
-	ES2015: ES2015,
-	ES7: ES2016,
-	ES2016: ES2016,
-	ES2017: ES2017,
-	ES2018: ES2018
-};
-assign(ES, ES5);
-delete ES.CheckObjectCoercible; // renamed in ES6 to RequireObjectCoercible
-assign(ES, ES2015);
-
-module.exports = ES;