Bump webpacker from 3.5.5 to 5.4.0

[dependabot-preview]

Bumps webpacker from 3.5.5 to 5.4.0.

Changelog

Sourced from webpacker's changelog.

[5.4.0] - 2021-05-18

• Fix compatibility with Psych 4

[5.3.0] - 2021-04-27

• Adds experimental Yarn 2 support. Note you must manually set nodeLinker: node-modules in your .yarnrc.yml.

• Keep backups, even when they're old #2912

[5.2.2] - 2021-04-27

• Bump deps and remove node-sass #2997.

[5.2.1] - 2020-08-17

• Revert #1311.

[5.2.0] - 2020-08-16

• Bump dependencies and fixes. See diff for changes.

[5.1.1] - 2020-04-20

• Update TypeScript documentation and installer to use babel-loader for typescript.[(#2541](rails/webpacker#2541)

[5.1.0] - 2020-04-19

• Remove yarn integrity check #2518
• Switch from ts-loader to babel-loader #2449 Please see the TypeScript documentation to upgrade existing projects to use typescript with 5.1
• Resolve multi-word snakecase WEBPACKER_DEV_SERVER env values #2528

[5.0.1] - 2020-03-22

• Upgrade deps and fix sass loader config options bug #2508

[5.0.0] - 2020-03-22

• Bump minimum node version #2428
• Bump minimum ruby/rails version #2415
• Add support for multiple files per entry #2476

  entry: {
    home: ['./home.js', './home.scss'],
    account: ['./account.js', './account.scss']
  }

... (truncated)

Commits

• 272762d 5.4.0
• 7c6e1c2 Minor deps bump
• ceaf826 Fix compatibility with Psych 4
• 34c02ff 5.3.0
• eedd2ab Keep backups, even when they're old. (#2734) (#2912)
• 745837a 5.2.2
• 21e2e6a Bump deps and remove node-sass (#2997)
• 6fbacc8 Merge pull request #2903 from pedrofurtado/5-x-stable
• 27a42bf Update ruby.yml
• b46ce72 Update file.js (#2902)
• Additional commits viewable in compare view

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