Fix jest-extended loading

Author: Michal Vlasák

jest.config.js

@@ -8,5 +8,5 @@ module.exports = {
     collectCoverage: true,
     // testURL because of problems with jsdom https://github.com/jsdom/jsdom/issues/2304
     testURL: "http://localhost",
-    setupFilesAfterEnv: ['<rootDir>/src/tests/setup.ts'],
+    setupFilesAfterEnv: ['jest-extended'],
 };