Ensure we support sdk v0.43 as well

[ethanfrey]

This seems to have some breaking changes (in events at least... maybe some in protobuf msg?) from 0.42, so the relayer must be smart enough to handle it.

See informalsystems/hermes#918 and informalsystems/hermes#1057

[ethanfrey]

We should also favor the packet_data_hex attribute (if present) over packet_data.

This is only present in ibc-go: https://github.com/cosmos/ibc-go/blob/main/modules/core/04-channel/keeper/packet.go#L135

[ethanfrey]

This should work with CosmJS 0.27.
We need to test the ibc semantics, maybe add hex_data etc.
Definitely need to update CI script

[webmaster128]

Please note that the simapp 0.44 (maybe 0.43 as well) does not include IBC support anymore because the ibc module was removed from the cosmos-sdk repo. So this might require changes to the test setup.

[ethanfrey]

Oh no.
I guess I can test with gaia v6.0 or something... and ensure both 0.42 and 0.44 support?
And then ibc 1.2 and ibc 2.0?
ugh

[ethanfrey]

Closed by #214 as gaiad v6 is using Cosmos SDK 0.44 and ibcv2