Bump rustler from 0.10.1 to 0.16.0
Bump rustler from 0.10.1 to 0.16.0

Bumps [rustler](https://github.com/hansihe/Rustler) from 0.10.1 to 0.16.0.
- [Changelog](https://github.com/hansihe/rustler/blob/master/RELEASE_CHECKLIST.md)
- [Commits](https://github.com/hansihe/Rustler/commits/0.16.0)
elitau/pact_elixir