Bump jsonpointer and koa-oas3

Bumps [jsonpointer](https://github.com/janl/node-jsonpointer) to 5.0.1 and updates ancestor dependency koa-oas3. These dependencies need to be updated together.


Updates `jsonpointer` from 4.1.0 to 5.0.1
- [Release notes](https://github.com/janl/node-jsonpointer/releases)
- [Commits](janl/node-jsonpointer@v4.1.0...v5.0.1)

Updates `koa-oas3` from 2.3.1 to 2.5.0

---
updated-dependencies:
- dependency-name: jsonpointer
  dependency-type: indirect
- dependency-name: koa-oas3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>