Repository: create-react-app
Issue: Build warning /static/js/filename.chunk.js is 3.87 MB, and won't be precached. Configure maximumFileSizeToCacheInBytes to change this limit.
Labels: needs triage,issue: bug report

### Describe the bug

After updating to v4.0.0 when I build I get the below warning, which causes the build to fail in CI environment:

```
/static/js/155.6cc63d87.chunk.js is 3.87 MB, and won't be precached. Configure maximumFileSizeToCacheInBytes to change this limit.
```

The weird thing is that when I build, the output of the build command doesnt show the file to be that size

```
637.26 KB  build\static\js\155.6cc63d87.chunk.js 
```

However, if I list the file directly it is much bigger than the build output says it is:

```
-a----         11/2/2020   8:34 AM        3874415 155.6cc63d87.chunk.js
-a----         11/2/2020   8:34 AM           4248 155.6cc63d87.chunk.js.LICENSE.txt
-a----         11/2/2020   8:34 AM        7869621 155.6cc63d87.chunk.js.map
```

### Did you try recovering your dependencies?

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Yes. Deleted node_modules, yarn.lock - did not help

### Which terms did you search for in User Guide?

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n/a

### Environment

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```
Environment Info:

  current version of create-react-app: 4.0.0
  running from C:\Users\cbraunstein\AppData\Roaming\npm-cache\_npx\17108\node_modules\create-react-app

  System:
    OS: Windows 10 10.0.20246
    CPU: (8) x64 Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz
  Binaries:
    Node: 12.18.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.5 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.14.4 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 86.0.4240.111
    Edge: Spartan (44.20246.1.0), ChromiumDev (88.0.680.1)
    Internet Explorer: 11.0.20246.1
  npmPackages:
    react: 17.0.1 => 17.0.1
    react-dom: 17.0.1 => 17.0.1
    react-scripts: 4.0.0 => 4.0.0
  npmGlobalPackages:
    create-react-app: Not Found
```

### Steps to reproduce

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(Write your steps here:)

1. `yarn build`

### Expected behavior

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No warning should be outputted

### Actual behavior

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A warning is outputted from the build. In case of a CI the build is failed.

### Reproducible demo

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I can not share this project. I will try to create a blank one and see if I can recreate it.

```
 ~\..\..\devops   main ≣ ~1 -0 !  yarn build
yarn run v1.22.5
$ react-scripts build
Creating an optimized production build...
Compiled with warnings.

/static/js/155.6cc63d87.chunk.js is 3.87 MB, and won't be precached. Configure maximumFileSizeToCacheInBytes to change this limit.

Search for the keywords to learn more about each warning.
To ignore, add // eslint-disable-next-line to the line before.

File sizes after gzip:

  637.26 KB  build\static\js\155.6cc63d87.chunk.js
  63.52 KB   build\static\js\159.768d4811.chunk.js
  19.48 KB   build\static\js\157.913aa113.chunk.js
  11.56 KB   build\static\js\156.6ba34070.chunk.js
  9.91 KB    build\static\js\main.d5a9c99f.chunk.js
```
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