v1.8.0

What's Changed

• This release removes the long-standing compatibiltiy shim between hashicorp/go-metrics and armon/go-metrics. You no longer need to set build tags when consuming this library. If you have other libraries that consume this library, you should upgrade them at the same time as your application.
• Raft now persists the commit index in the LogStore to accelerate recovery

Full Changelog: v1.7.3...v1.8.0