`ts-jest` in the `transform` option not found

[brian-smith-tcril]

When making openedx/frontend-app-authn#1497 I ran into the following error

● Validation Error:

  Module ts-jest in the transform option was not found.
         <rootDir> is: /home/bsmith/code/frontend-app-authn

  Configuration Documentation:
  https://jestjs.io/docs/configuration

I was able to work around it by running npm install ts-jest --save-dev directly in the MFE, but it seems like we shouldn't need to do that.