Bump @rails/webpacker from 5.0.0 to 5.2.1

[dependabot-preview]

Bumps @rails/webpacker from 5.0.0 to 5.2.1.

Changelog

Sourced from @rails/webpacker's changelog.

[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

Commits

• 9ec5daa 5.2.1
• e0b693d Revert "set Webpacker logger to tagged when rails TaggedLogging (#1311)"
• 38e3028 Fix test
• b7eb831 5.2.0
• f929500 Update webpack dependencies (#2692)
• 905b8ab Update terser-webpack-plugin (#2687)
• 63ff6e4 Minor dependency bump (#2686)
• 370fbfd Lint
• df050da Update debugging instructions (#2422)
• 92a1fdc environment.plugins.get('Manifest').opts is now environment.plugins.get('Mani...
• Additional commits viewable in compare view

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