GitHub: Bump koa from 2.15.4 to 2.16.1

Squash commits of branch dependabot/npm_and_yarn/koa-2.16.1:

- Bump koa from 2.15.4 to 2.16.1

Bumps [koa](https://github.com/koajs/koa) from 2.15.4 to 2.16.1.
- [Release notes](https://github.com/koajs/koa/releases)
- [Changelog](https://github.com/koajs/koa/blob/master/History.md)
- [Commits](https://github.com/koajs/koa/compare/2.15.4...v2.16.1)

---
updated-dependencies:
- dependency-name: koa
  dependency-version: 2.16.1
  dependency-type: indirect
...



- Merge pushlog_id_as_long, db connection refactoring

The changes involving a new Consumer API have been merged into the feature branch. This especially involves external sorting. Furthermore, the unit tests for CsvResource are now relying on real database connection.
Add aggregate functions and streams in queryable store

First, aggregate functions for minimum, maximum, sum and average
have been added to the queryable store API. These can be used
with the query fields, which have been enhanced for this.

Second, an additional stream like API has been added to retrieve
collections to avoid the creation of huge result objects.

- Merge branch 'develop' into dependabot/npm_and_yarn/koa-2.16.1

yarn.lock

@@ -13548,9 +13548,9 @@ koa-static@^5.0.0:
     koa-send "^5.0.0"
 
 koa@^2.5.3:
-  version "2.15.4"
-  resolved "https://registry.yarnpkg.com/koa/-/koa-2.15.4.tgz#7000b3d8354558671adb1ba1b1c09bedb5f8da75"
-  integrity sha512-7fNBIdrU2PEgLljXoPWoyY4r1e+ToWCmzS/wwMPbUNs7X+5MMET1ObhJBlUkF5uZG9B6QhM2zS1TsH6adegkiQ==
+  version "2.16.1"
+  resolved "https://registry.yarnpkg.com/koa/-/koa-2.16.1.tgz#ba1aae04d8319d7dac4a17a0d289d7482501e194"
+  integrity sha512-umfX9d3iuSxTQP4pnzLOz0HKnPg0FaUUIKcye2lOiz3KPu1Y3M3xlz76dISdFPQs37P9eJz1wUpcTS6KDPn9fA==
   dependencies:
     accepts "^1.3.5"
     cache-content-type "^1.0.0"