Update dependency css-loader to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
css-loader	devDependencies	major	3.6.0 -> 4.3.0

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Release Notes

webpack-contrib/css-loader

v4.3.0

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Features

• the importLoaders can be string (#​1178) (ec58a7c)

Bug Fixes

• line breaks in url function (88b8ddc)

4.2.2 (2020-08-24)

Bug Fixes

• source maps generation, source from source maps are now relative to compiler.context and use webpack:// protocol (#​1169) (fb5c53d)

4.2.1 (2020-08-06)

Bug Fixes

• regression with the exportOnlyLocals option, now locals are not exported under the locals name, it was big regression, we apologize for that (24c0a12)

v4.2.2

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v4.2.1

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v4.2.0

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Features

• add module.type option, the icss option is deprecated (#​1150) (68f72af)

4.1.1 (2020-07-30)

Bug Fixes

• remove unnecessary console call (#​1148) (b1b90ca)

v4.1.1

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v4.1.0

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Features

• add icss option (#​1140) (a8ec7da)
• support absolute paths (f9ba0ce)

Bug Fixes

• do not crash with data URLs (#​1142) (91bc64b)
• performance (#​1144) (4f1baa2)

v4.0.0

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⚠ BREAKING CHANGES

• minimum required Node.js version is 10.13.0
• minimum required webpack version is 4.27.0
• the esModule option is true by default
• default value of the sourceMap option depends on the devtool option
• icss plugin disable by default, you need to setup the modules option to enable it
• the modules option is true by default for all files matching /\.module\.\w+$/i.test(filename) regular expression, module.auto is true by default
• the modules.context option was renamed to the modules.localIdentContext option
• default the modules.localIdentContext value is compiler.context for the module.getLocalIdent option
• the modules.hashPrefix option was renamed to the modules.localIdentHashPrefix option
• the localsConvention option was moved and renamed to the modules.exportLocalsConvention option
• the getLocalIndent option should be always Function and should always return String value
• the onlyLocals option was moved and renamed to the modules.exportOnlyLocals option
• function arguments of the import option were changed, it is now function(url, media, resourcePath) {}
• inline syntax was changed, please write ~ before the file request, i.e. rewrite url(~!!loader!package/img.png) to url(!!loader!~package/img.png)

Features

• @value supports importing url() (#​1126) (7f49a0a)
• improve url() resolving algorithm (bc19ddd)
• named export for locals (#​1108) (d139ec1)
• respected the style field from package.json (#​1099) (edf5347)
• support file: protocol (5604205)
• support server relative URLs

Bug Fixes

• resolution algorithm, you don't need ~ inside packages in node_modules (76f1480)

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