build(deps): bump immutable from 5.0.3 to 5.1.5 in /frontend#440

dependabot[bot] wants to merge 1 commit intomasterfirebase/firebaseopensource.com:masterfrom

dependabot/npm_and_yarn/frontend/immutable-5.1.5firebase/firebaseopensource.com:dependabot/npm_and_yarn/frontend/immutable-5.1.5Copy head branch name to clipboard