plumbing changes necessary to allow for gossip through an intermediar…

…y network hop (hashicorp#590)

Update ForceLeave Prune (hashicorp#580)

* Prune flag on ForceLeave added. Refactor of `reap` function to call to `eraseNode`.

Update CHANGELOG.md

Merge pull request hashicorp#560 from hashicorp/fix-module-dev-deps

Get rid of depreqs pacakge

Version 0.8.2

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Version 0.8.0

Version 0.7.0