Repository: create-react-app
Issue: Travis build fails with default config due to old Node version
Labels: needs triage,issue: bug report

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### Describe the bug

The default config for Travis CI on [this page](https://create-react-app.dev/docs/running-tests#travis-ci) ([`running-tests.md`](https://github.com/facebook/create-react-app/blob/master/docusaurus/docs/running-tests.md)) suggests the use of Node 8.

Create React App, however, has moved on and some of its dependencies require a later Node version so the CI build fails with very strange and unhelpful warnings.

Setting Node version to 12 in `.travis.yml` resolves the issue.


### Did you try recovering your dependencies?

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No.

### Which terms did you search for in User Guide?

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"Travis CI"

### Environment

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  `npx create-react-app --info`

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Environment on my local system:

```
Environment Info:

  current version of create-react-app: 4.0.2
  running from C:\Users\<censored-username>\AppData\Roaming\npm-cache\_npx\10984\node_modules\create-react-app

  System:
    OS: Windows 10 10.0.19041
    CPU: (6) x64 Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
  Binaries:
    Node: 12.18.0 - C:\Program Files\nodejs\node.EXE
    Yarn: Not Found
    npm: 6.14.4 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 88.0.4324.146
    Edge: Spartan (44.19041.423.0), Chromium (88.0.705.68)
    Internet Explorer: 11.0.19041.1
  npmPackages:
    react: ^17.0.1 => 17.0.1
    react-dom: ^17.0.1 => 17.0.1
    react-scripts: 4.0.2 => 4.0.2
  npmGlobalPackages:
    create-react-app: Not Found
```

### Steps to reproduce

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1. Create a new react app `npx create-react-app app-name`
2. Add `.travis.yml` from the docs to the project
3. Push the changes to GitHub

### Expected behavior

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I expected a clean CI build on a fresh project.

### Actual behavior

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I don't think this is relevant but pasting it anyway. Build fails with:

```
> react-scripts build
/home/travis/build/Glusk/app-name/node_modules/fs-extra/lib/mkdirs/make-dir.js:85
      } catch {
              ^
SyntaxError: Unexpected token {
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:617:28)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/home/travis/build/Glusk/app-name/node_modules/fs-extra/lib/mkdirs/index.js:3:44)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! app-name@0.1.0 build: `react-scripts build`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the app-name@0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/travis/.npm/_logs/2021-02-14T13_39_49_905Z-debug.log
The command "npm run build" exited with 1.
0.41s$ npm test
> app-name@0.1.0 test /home/travis/build/Glusk/app-name
> react-scripts test
/home/travis/build/Glusk/app-name/node_modules/jest/node_modules/jest-cli/build/cli/index.js:227
    } catch {
            ^
SyntaxError: Unexpected token {
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:617:28)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/home/travis/build/Glusk/app-name/node_modules/jest/node_modules/jest-cli/build/index.js:13:12)
npm ERR! Test failed.  See above for more details.
The command "npm test" exited with 1.
```

### Reproducible demo

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