Bump json5 and postcss-modules in /frontend

[dependabot[bot]]

Removes json5. It's no longer used after updating ancestor dependency postcss-modules. These dependencies need to be updated together.

Removes json5

Updates postcss-modules from 4.1.3 to 4.3.1

Changelog

Sourced from postcss-modules's changelog.

4.3.1

• Fixed errors when using shorthand selectors by Felix Bruns (@​fxb) madyankin/postcss-modules#130

4.3.0

• Updated the generic-names dependency to reduce packages size by Bogdan Chadkin (@​TrySound) madyankin/postcss-modules#129

4.2.2

• Fix the build

4.2.1

• Fixed the resolve option behaviour by @​kamilic madyankin/postcss-modules#127

4.2.0

• Added the resolve option to configure lookup paths for composes/from by @​kamilic madyankin/postcss-modules#126

Commits

• 171b8c8 4.3.1
• 8bd118d Merge branch 'master' of github.com:css-modules/postcss-modules
• f3bfc6d Update changelog
• a400e14 Add tests for :global and :local shorthand selectors.
• 3c8ba0c Use localByDefault plugin for both local and global behaviours.
• d7cefc4 4.3.0
• 8737b69 Update changelog
• cf9e208 Update package-lock.json
• 5bd346c Upgrade generic-names
• b7e0d41 Update copyright note
• Additional commits viewable in compare view

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