Update dependency css-loader to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
css-loader	^5.2.6 -> ^6.2.0

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Release Notes

webpack-contrib/css-loader

v6.2.0

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Features

• allow the exportLocalsConvention option can be a function useful for named export (#​1351) (3c4b357)

v6.1.0

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Features

• add link in schema (#​1345) (7d4e493)

Bug Fixes

• respect the localIdentRegExp option (#​1349) (42f150b)

v6.0.0

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Notes

• using ~ is deprecated when the esModules option is enabled (enabled by default) and can be removed from your code (we recommend it) (url(~package/image.png) -> url(package/image.png), @import url(~package/style.css) -> @import url(package/style.css), composes: import from '~package/one.css'; -> composes: import from 'package/one.css';), but we still support it for historical reasons. Why can you remove it? The loader will first try to resolve @import/url()/etc as relative, if it cannot be resolved, the loader will try to resolve @import/url()/etc inside node_modules or modules directories.
• file-loader and url-loader are deprecated, please migrate on asset modules, since v6 css-loader is generating new URL(...) syntax, it enables by default built-in assets modules, i.e. type: 'asset' for all url()

⚠ BREAKING CHANGES

• minimum supported Node.js version is 12.13.0
• minimum supported webpack version is 5, we recommend to update to the latest version for better performance
• for url and import options Function type was removed in favor Object type with the filter property, i.e. before { url: () => true }, now { url: { filter: () => true } } and before { import: () => true }, now { import: { filter: () => true } }
• the modules.compileType option was removed in favor the modules.mode option with icss value, also the modules option can have icss string value
• new URL() syntax used for url(), only when the esModules option is enabled (enabled by default), it means you can bundle CSS for libraries
• data URI are handling in url(), it means you can register loaders for them, example
• aliases with false value for url() now generate empty data URI (i.e. data:0,), only when the esModules option is enabled (enabled by default)
• [ext] placeholder don't need . (dot) before for the localIdentName option, i.e. please change .[ext] on [ext] (no dot before)
• [folder] placeholder was removed without replacement for the localIdentName option, please use a custom function if you need complex logic
• [emoji] placeholder was removed without replacement for the localIdentName option, please use a custom function if you need complex logic
• the localIdentHashPrefix was removed in favor the localIdentHashSalt option

Features

• supported resolve.byDependency.css resolve options for @import
• supported resolve.byDependency.icss resolve CSS modules and ICSS imports (i.e. composes/etc)
• added modules.localIdentHashFunction, modules.localIdentHashDigest, modules.localIdentHashDigestLength options for better class hashing controlling
• less dependencies

Bug Fixes

• better performance
• fixed circular @import

Notes

• we strongly recommend not to add .css to resolve.extensions, it reduces performance and in most cases it is simply not necessary, alternative you can set resolve options by dependency

5.2.7 (2021-07-13)

Bug Fixes

• fix crash when source map is unavailable with external URL in [@import](https://togithub.com/import) (bb76fe4)

5.2.6 (2021-05-24)

Bug Fixes

• always write locals export when css modules/icss enabled (#​1315) (075d9bd)

5.2.5 (2021-05-20)

Bug Fixes

• compatibility with named export and es5 (#​1314) (0cf8cde)

5.2.4 (2021-04-19)

Bug Fixes

• do not crash on 'false' aliases (#​1292) (e913cb1)

5.2.3 (2021-04-19)

Bug Fixes

• improve performance

5.2.2 (2021-04-16)

Bug Fixes

• avoid escape nonASCII characters in local names (0722733)

5.2.1 (2021-04-09)

Bug Fixes

• do not crash on unescaped svg data uri (#​1288) (4f289c5)

v5.2.7

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