Bump pony-cause from 2.1.8 to 2.1.9 (#86)

Bumps [pony-cause](https://github.com/voxpelli/pony-cause) from 2.1.8 to 2.1.9.
- [Release notes](https://github.com/voxpelli/pony-cause/releases)
- [Commits](voxpelli/pony-cause@v2.1.8...v2.1.9)
---
updated-dependencies:
- dependency-name: pony-cause
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]