Bump ethon from 0.14.0 to 0.15.0
Bump ethon from 0.14.0 to 0.15.0

Bumps [ethon](https://github.com/typhoeus/ethon) from 0.14.0 to 0.15.0.
- [Release notes](https://github.com/typhoeus/ethon/releases)
- [Changelog](https://github.com/typhoeus/ethon/blob/master/CHANGELOG.md)
- [Commits](https://github.com/typhoeus/ethon/compare/v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: ethon
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
andrew/gitballs