Revert "adds dedicated esm jest and ts config"

This reverts commit 5bf3428.

Author: Daniel Del Core

jest.config.js

@@ -1,15 +1,12 @@
-/** @type {import('ts-jest').JestConfigWithTsJest} */
 module.exports = {
   transform: {
     '^.+\\.ts$': [
       'ts-jest',
       {
-        tsconfig: 'tsconfig.test.json',
-        useESM: true,
+        tsconfig: 'tsconfig.json',
       },
     ],
   },
-  extensionsToTreatAsEsm: ['.ts'],
   moduleFileExtensions: ['ts', 'js'],
   testRegex: '^.+\\.(spec|test)\\.(ts|js)$',
   snapshotSerializers: ['jest-serializer-html-string'],
@@ -18,7 +15,6 @@ module.exports = {
     'jest-watch-typeahead/testname',
   ],
   moduleNameMapper: {
-    '^(\\.{1,2}/.*)\\.js$': '$1',
     '@hypermod/(.*)$': '<rootDir>/packages/$1/src',
     '@codeshift/(.*)$': '<rootDir>/packages/$1/src',
   },