Bump autoprefixer from 10.4.2 to 10.4.7 in /frontend#737

dependabot[bot] wants to merge 1 commit intomainfilecoin-project/system-test-matrix:mainfrom

dependabot/npm_and_yarn/frontend/main/autoprefixer-10.4.7filecoin-project/system-test-matrix:dependabot/npm_and_yarn/frontend/main/autoprefixer-10.4.7Copy head branch name to clipboard