build: update mini-css-extract-plugin to version 1.2.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
mini-css-extract-plugin	dependencies	patch	1.2.0 -> 1.2.1
mini-css-extract-plugin	devDependencies	patch	1.2.0 -> 1.2.1

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Release Notes

webpack-contrib/mini-css-extract-plugin

v1.2.1

Compare Source

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Renovate configuration

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