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Fix with-jest-typescript example to keep babel-jest in sync with jest (#5941)

This fixes the `with-jest-typescript` example to keep jest in sync with babel-jest (also updated to the latest of both). Having them resolve to different versions was resulting in weird errors.

When attempting to update the `transform` property in `jest.setup.js` to add babel-jest support to *.js/jsx files, it would throw:

> Plugin 0 specified in "node_modules/next/babel.js" provided an invalid property of "default" (While processing preset: "node_modules/next/babel.js")

Indirectly, this will fix https://github.com/zeit/next.js/issues/5917, once the author updates `jest.setup.js` to have:
```js
  transform: {
    '^.+\\.(js|tsx)?$': 'babel-jest',
  },
```

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