Bump koa from 2.14.2 to 2.15.4#12

dependabot[bot] wants to merge 1 commit intoinitial-benchmarkslit/platform-benchmarks:initial-benchmarksfrom

dependabot/npm_and_yarn/koa-2.15.4lit/platform-benchmarks:dependabot/npm_and_yarn/koa-2.15.4Copy head branch name to clipboard