build(deps): bump attohttpc from 0.28.2 to 0.30.0

---
updated-dependencies:
- dependency-name: attohttpc
  dependency-version: 0.30.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]