feat(prevNode): add "prevNode" to "Set" response
feat(prevNode): add test for prevNode
bump(github.com/coreos/raft): ef3280ce54f60fff98a72012f547ed2b3415841f
Merge pull request #514 from cenkalti/prevNode

feat(prevNode): add "prevNode" to "Set" response
Merge pull request #543 from philips/bump-goraft

bump(github.com/coreos/raft): ef3280ce54f60fff98a72012f547ed2b3415841f
fix(v2): Use case-insensitive check on bool query params

Fix issue #261