add some babel stuff

node_modules/es-abstract/index.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var assign = require('./helpers/assign');
+
+var ES5 = require('./es5');
+var ES2015 = require('./es2015');
+var ES2016 = require('./es2016');
+var ES2017 = require('./es2017');
+
+var ES = {
+	ES5: ES5,
+	ES6: ES2015,
+	ES2015: ES2015,
+	ES7: ES2016,
+	ES2016: ES2016,
+	ES2017: ES2017
+};
+assign(ES, ES5);
+delete ES.CheckObjectCoercible; // renamed in ES6 to RequireObjectCoercible
+assign(ES, ES2015);
+
+module.exports = ES;