feat: Upgrade Malachite

[varun-doshi]

Ref #181

This PR resulted in quite some changes, primarily due to breaking changes in Malachite v0.0.1 compared to the commit Snapchain was using previously.
There are many missing implementations in traits and Enums such as in SnapchainValidatorContext and Effect, TimeoutKind.
Another function that needs to be looked at is handle_msg in src/consensus/consensus.rs

[varunsrin]

thanks for the pr, someone will review it soon

[varunsrin]

also, can you comment on the issue so that i can assign it to you @varun-doshi ?

[aditiharini]

Were you able to start up 3 nodes locally and see consensus progressing? This will likely not work until we propagate the gossip messages into consensus (i.e. do what we were previously doing for the Broadcast effect, but it's a good way to test that these changes have roughly worked as expected.
cargo run --bin setup_local_testnet
cargo run -- --config-path nodes/1/snapchain.toml
cargo run -- --config-path nodes/2/snapchain.toml
cargo run -- --config-path nodes/3/snapchain.toml

[aditiharini]

So far this looks reasonable, let me know if it'd be useful to get some input on the remaining todos and/or figuring out where to plumb gossip messages through consensus.

[sds]

You'll want to rebase the changes from #187 so that the Docker image builds. Tests are still failing however, so we'll want to make sure those are fixed as well.