Use Jest version 27.0.1

See release notes: https://jestjs.io/blog/2021/05/25/jest-27

There is currently one issue with global `afterEach` callbacks order which I workarounded by using `afterAll` (see: jestjs/jest#11456). I will wait for the resolution of that issue and update our code accordingly.

adeira-source-id: 154daeb2c02992787370c74c897cfb6a6164b0ab

Author: mrtnzlml

src/__tests__/helpers.getRequestBody.test.js

@@ -1,4 +1,7 @@
-// @flow
+/**
+ * @flow
+ * @jest-environment jsdom
+ */
 
 import { getRequestBody } from '../helpers';