build(deps-dev): bump mini-css-extract-plugin from 1.6.0 to 2.1.0 in /frontend#1009

marco-c merged 1 commit intomastermozilla/code-coverage:masterfrom

dependabot/npm_and_yarn/frontend/mini-css-extract-plugin-2.1.0mozilla/code-coverage:dependabot/npm_and_yarn/frontend/mini-css-extract-plugin-2.1.0Copy head branch name to clipboard