Revert "test: Resolves setupFiles instead of letting Jest handling it (#3201)"

This reverts commit 0c4c6b3.

Author: JPeer264

jest.config.js

@@ -1,7 +1,7 @@
 module.exports = {
   collectCoverage: true,
   testEnvironment: 'node',
-  setupFiles: [require.resolve('./setupTests.js')],
+  setupFiles: ['<rootDir>/setupTests.js'],
   testPathIgnorePatterns: ['<rootDir>/src/', '<rootDir>/tests/integration/'],
   transform: {
     '^.+\\.ts$': 'ts-jest',