message: Update README.md to "fix"
diff: @@ -146,6 +146,18 @@ For all available `tsc` options see [TypeScript docs](https://www.typescriptlang
  Note that if you haven't explicitly set the `module` property through a separate configuration file with `tsConfigFile`, it will be overwritten to `commonjs` (regardless of the value in `tsconfig.json`) since that is the format Jest expects. This only happens during testing.
  +If you *have* explicitly set the `module` property but to a different value than `commonjs`, Jest may throw errors. In that case, a practical workaround is to make a `tsconfig.jest.json` file which [`extends`](http://www.typescriptlang.org/docs/handbook/tsconfig-json.html#configuration-inheritance-with-extends) your real `tsconfig.json` but sets `module` to `commonjs`:
  +
  +```js
  +// tsconfig.jest.json
  +{
  + "extends": "./tsconfig",
  + "compilerOptions": {
  + "module": "commonjs"
  + }
  +}
  +```
  +
  ### Module path mapping
  If you use ["baseUrl"](https://www.typescriptlang.org/docs/handbook/module-resolution.html) and "paths" options for the compiler, see ["moduleNameMapper"](https://facebook.github.io/jest/docs/en/configuration.html#modulenamemapper-object-string-string) option on Jest docs.
  