main
clientv3: Move to client/v3 (just file move)
client/v3: use pointer header in WatchResponse
Replace mvccpb.PUT and mvccpb.DELETE with mvccpb.Event_PUT and mvccpb.Event_DELETE
fix typo in concurrent examples
fix: enable gofumpt instead of gofmt linter in client
clientv3: add Ctx() to return context of session
client/v3: fix revive unexported-return issues
clientv3: prevent nil pointer call in get method