Repository: create-react-app
Issue: babel.loadPartialConfigSync is not a function
Labels: needs triage,issue: bug report

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### Describe the bug

I have upgraded react-scripts package to latest 5.0.0.  While running 'npm run build' got following error:
```
src/store.js
  Line 0:  Parsing error: babel.loadPartialConfigSync is not a function


npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-app@0.1.0 build: `react-scripts build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-app@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:
```

### Did you try recovering your dependencies?

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```
#npm --version
6.14.15
```

### Which terms did you search for in User Guide?

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### Environment

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```
# npm --version
6.14.15
# npx create-react-app --info
npx: installed 67 in 4.61s

Environment Info:

  current version of create-react-app: 5.0.0
  running from /root/.npm/_npx/18603/lib/node_modules/create-react-app

  System:
    OS: Linux 4.18 CentOS Linux 8
    CPU: (2) x64 AMD EPYC 7571
  Binaries:
    Node: 14.17.1 - ~/.nvm/versions/node/v14.17.1/bin/node
    Yarn: Not Found
    npm: 6.14.15 - ~/.nvm/versions/node/v14.17.1/bin/npm
  Browsers:
    Chrome: Not Found
    Firefox: Not Found
  npmPackages:
    react: ^16.13.1 => 16.14.0 (0.14.10, 15.7.0, 0.9.0)
    react-dom: ^16.13.1 => 16.14.0
    react-scripts: 5.0.0 => 5.0.0
  npmGlobalPackages:
    create-react-app: Not Found
```

### Steps to reproduce

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### Expected behavior

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