Bump stringstream from 0.0.5 to 0.0.6

Bumps [stringstream](https://github.com/mhart/StringStream) from 0.0.5 to 0.0.6.
- [Commits](mhart/StringStream@v0.0.5...v0.0.6)

---
updated-dependencies:
- dependency-name: stringstream
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>