chore(deps): update dependency css-loader to v5.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
css-loader	5.1.1 -> 5.1.2

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Release Notes

webpack-contrib/css-loader

### [`v5.1.2`](https://togithub.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md#​512-httpsgithubcomwebpack-contribcss-loadercomparev511v512-2021-03-10) [Compare Source](https://togithub.com/webpack-contrib/css-loader/compare/v5.1.1...v5.1.2)

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