Bump smee-client from 1.2.3 to 2.0.0

Bumps [smee-client](https://github.com/probot/smee-client) from 1.2.3 to 2.0.0.
- [Release notes](https://github.com/probot/smee-client/releases)
- [Commits](probot/smee-client@v1.2.3...v2.0.0)

---
updated-dependencies:
- dependency-name: smee-client
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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