Fixed a test-error that mysteriously popped up

package.json

@@ -116,6 +116,7 @@
     ],
     "transformIgnorePatterns": [
       "/node_modules/",
+      "/packages/babel-standalone/babel.js",
       "<rootDir>/packages/babel-standalone/babel(\\.min)?\\.js",
       "<rootDir>/packages/babel-preset-env-standalone/babel-preset-env(\\.min)?\\.js",
       "/test/(fixtures|tmp|__data__)/",

packages/babel-runtime-corejs2/helpers/esm/iterableToArray.js

@@ -1,5 +1,5 @@
-import _Array$from from "../../core-js/array/from";
-import _isIterable from "../../core-js/is-iterable";
+import _Array$from from "..\\../core-js/array/from";
+import _isIterable from "..\\../core-js/is-iterable";
 export default function _iterableToArray(iter) {
   if (_isIterable(Object(iter)) || Object.prototype.toString.call(iter) === "[object Arguments]") return _Array$from(iter);
 }