fix: jest 22 did not have default config

Author: huafu

e2e/__templates__/with-jest-22/jest.config.js

@@ -1,5 +1,7 @@
+const { jestPreset } = require('ts-jest');
+
 module.exports = {
-  preset: 'ts-jest',
+  ...jestPreset,
   testEnvironment: 'node',
   globals: { 'ts-jest': { tsConfig: {} } },
 };

src/utils/create-jest-preset.ts

@@ -1,6 +1,13 @@
-import { defaults } from 'jest-config';
+import * as jestConfig from 'jest-config';
 import { CreateJestPresetOptions } from '../types';
 
+// jest 22 doesn't have defaults
+const defaults = jestConfig.defaults || {
+  transform: null,
+  testMatch: ['**/__tests__/**/*.js?(x)', '**/?(*.)+(spec|test).js?(x)'],
+  moduleFileExtensions: ['js', 'json', 'jsx', 'node'],
+};
+
 // TODO: find out if tsconfig that we'll use contains `allowJs`
 // and change the transform so that it also uses ts-jest for js files