Bump cppfront from 2633251 to e89b6ba (#154)

Bumps [cppfront](https://github.com/hsutter/cppfront) from `2633251` to `e89b6ba`.
- [Release notes](https://github.com/hsutter/cppfront/releases)
- [Commits](hsutter/cppfront@2633251...e89b6ba)

---
updated-dependencies:
- dependency-name: cppfront
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>