Repository: create-react-app
Issue: react-scripts imports all NodeJS types into browser-facing code
Labels: needs triage,issue: bug report

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### Describe the bug

By default, the TypeScript template creates `react-app-end.d.ts` which includes:

```ts
/// <reference types="react-scripts" />
```

The `react-scripts` module in turn includes `react-app.d.ts` which has the following reference:

```ts
/// <reference types="node" />
```

This results in all NodeJS types being imported into the project, even if they have been excluded by setting `"types": []` in the `tsconfig.json`. So, if I try to use `setTimeout()`, TypeScript sees both the DOM version of this function and the  version from `@types/node`, which are not compatible (the latter returns an instance of the `NodeJS.Timeout` class instead of a numeric reference).

Even worse is that the `@nodejs/types` types import all the DOM types that are supported in the latest version of NodeJS. And since NodeJS supports all the same things as a modern version of Chromium, it results in very new things like `BigUint64Array` being treated as valid types, even if the project is explicitly targeting and older ES lib in `tsconfig.json`.

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N/A

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typescript node types incorrectly included

### Environment

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```
  current version of create-react-app: 3.4.1
  running from /Users/jonathanrimmer/.npm/_npx/56315/lib/node_modules/create-react-app

  Binaries:
    Node: 13.8.0 - ~/.nvm/versions/node/v13.8.0/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 6.13.6 - ~/.nvm/versions/node/v13.8.0/bin/npm
  Browsers:
    Chrome: 86.0.4240.80
    Firefox: Not Found
    Safari: 14.0
  npmPackages:
    react: ^16.13.1 => 16.13.1 
    react-dom: ^16.13.1 => 16.13.1 
    react-scripts: 3.4.3 => 3.4.3 
  npmGlobalPackages:
    create-react-app: Not Found
```

### Steps to reproduce

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1. `npx create-react-app cra-types-bug --template typescript`
2. Open `App.tsx`
3. Add `const handle: number = setTimeout(() => {}, 1000);`

### Expected behavior

It should work without errors.

`react-scripts` should reference *only* those specific NodeJS types, such as `process` that it makes available at build-time. It should not reference the entirety of NodeJS's type declarations.

### Actual behavior

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TypeScript thinks it is calling the Node version of `setTimout` and gives an error:

![image](https://user-images.githubusercontent.com/183786/95976615-b346ec00-0e0f-11eb-872a-3b4dca7f2708.png)


### Reproducible demo

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https://github.com/jonrimmer/cra-types-bug

1. `git clone https://github.com/jonrimmer/cra-types-bug.git`
2. `cd cra-types-bug`
3. `yarn build`


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