Upgrade: Bump immutable from 5.0.2 to 5.1.5#508

dependabot[bot] wants to merge 1 commit intomainr-40021/countdown-timer:mainfrom

dependabot/npm_and_yarn/immutable-5.1.5r-40021/countdown-timer:dependabot/npm_and_yarn/immutable-5.1.5Copy head branch name to clipboard