Bump degenerator and nwb

Removes [degenerator](https://github.com/TooTallNate/node-degenerator). It's no longer used after updating ancestor dependency [nwb](https://github.com/insin/nwb). These dependencies need to be updated together.


Removes `degenerator`

Updates `nwb` from 0.23.0 to 0.25.2
- [Release notes](https://github.com/insin/nwb/releases)
- [Changelog](https://github.com/insin/nwb/blob/v0.25.2/CHANGES.md)
- [Commits](insin/nwb@v0.23.0...v0.25.2)

---
updated-dependencies:
- dependency-name: degenerator
  dependency-type: indirect
- dependency-name: nwb
  dependency-type: direct:development
...

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

Author: dependabot[bot]