Intermittent failure in CI when deserializing consensus state vote summaries

[thanethomson]

The most recent example of this is here: https://github.com/informalsystems/tendermint-rs/pull/834/checks?check_run_id=2192937025

I've managed to figure out that sometimes the vote type is encoded as a number (1 or 2), and sometimes it's encoded as a string (SIGNED_MSG_TYPE_PREVOTE), and the code currently only caters for the former.

Steps to reproduce

Try deserializing the string causing the CI failure:

Vote{0:2DA21E474F57 384/00/SIGNED_MSG_TYPE_PREVOTE(Prevote) 8FA9FD23F590 2987C33E8F87 @ 2021-03-25T12:12:03.693870115Z}

What's the definition of "done" for this issue?

When we can parse these kinds of vote summaries.