Bump failure_derive from 0.1.5 to 0.1.6
Bump failure_derive from 0.1.5 to 0.1.6

Bumps [failure_derive](https://github.com/withoutboats/failure_derive) from 0.1.5 to 0.1.6.
- [Release notes](https://github.com/withoutboats/failure_derive/releases)
- [Commits](https://github.com/withoutboats/failure_derive/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
jasonwhite/button-rs