Update dependency mini-css-extract-plugin to v1.3.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mini-css-extract-plugin	1.3.1 -> 1.3.2

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Release Notes

webpack-contrib/mini-css-extract-plugin

### [`v1.3.2`](https://togithub.com/webpack-contrib/mini-css-extract-plugin/blob/master/CHANGELOG.md#​132-httpsgithubcomwebpack-contribmini-css-extract-plugincomparev131v132-2020-12-04) [Compare Source](https://togithub.com/webpack-contrib/mini-css-extract-plugin/compare/v1.3.1...v1.3.2)

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