v0.9.2

• Added:
  • 8b54a80f Raft::config() returns a ref to Config this raft node uses.
  • 7d5326ce add RaftMetrics::millis_since_quorum_ack.
• Improved:
  • d4a3053f Update example network err implementation.
  • d2d155db Use Unreachable error in examples/raft-kv-rocksdb.
• Fixed:
  • 17795e7f Ensure heartbeat results are returned to RaftCore.
  • 768dfdc9 Ensure RaftMetrics are sent after RaftDataMetrics and RaftServerMetrics.