build(deps): bump koa from 2.14.2 to 2.16.1 (#1683)

Bumps [koa](https://github.com/koajs/koa) from 2.14.2 to 2.16.1. - [Release notes](https://github.com/koajs/koa/releases) - [Changelog](https://github.com/koajs/koa/blob/master/History.md) - [Commits](koajs/koa@2.14.2...v2.16.1) --- updated-dependencies: - dependency-name: koa dependency-version: 2.16.1 dependency-type: indirect ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]