Convert back to CJS and use ncc.

jest.config.js

@@ -1,29 +1,14 @@
-// See: https://jestjs.io/docs/configuration
-
-/** @type {import('ts-jest').JestConfigWithTsJest} **/
-export default {
+module.exports = {
   clearMocks: true,
   collectCoverage: true,
   collectCoverageFrom: ['./src/**'],
   coverageDirectory: './coverage',
   coveragePathIgnorePatterns: ['/node_modules/', '/dist/'],
   coverageReporters: ['json-summary', 'text', 'lcov'],
-  extensionsToTreatAsEsm: ['.ts'],
-  moduleFileExtensions: ['ts', 'js'],
-  preset: 'ts-jest',
-  reporters: ['default'],
-  resolver: 'ts-jest-resolver',
-  testEnvironment: 'node',
+  moduleFileExtensions: ['js', 'ts'],
   testMatch: ['**/*.test.ts'],
-  testPathIgnorePatterns: ['/dist/', '/node_modules/'],
   transform: {
-    '^.+\\.ts$': [
-      'ts-jest',
-      {
-        tsconfig: 'tsconfig.eslint.json',
-        useESM: true
-      }
-    ]
+    '^.+\\.ts$': 'ts-jest'
   },
   verbose: true
 }