v3.0.0-rc2

This release includes v1 of the Interchain Accounts application module. 🍾
This is the first major feature addition since the v1.0.0 release of ibc-go. 👏
Kudos to everyone that has contributed to this feature on protocol design, implementation, testing and auditing. 🙏
Shout-out to the team at Chainapsis for the brilliant work that kick-started everything. 🌟
And last but not least, we want to thank @seantking for leading the efforts to bring all this to fruition.🥇

At a high level, when comparing to v3.0.0-rc1 this release:

• fixes the migration documentation for adding store upgrades for the ICS27 module.
• adds counterpartyChannelID to argument list of the OnChanOpenAck callback in the IBCModule interface.
• fixes the rejection of redundant packet messages within the same block. This fix entailed replacing the field of type channelkeeper.Keeper in the AnteDecorator structure with a field of type *keeper.Keeper.

Please see the CHANGELOG for the full set of changes included in this release.

Please read the migration doc, which provides information on updating from v2 to v3.

Special thanks to our external contributors on this release: @joe-bowman @catShaark @fedekunze

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To learn more about ibc-go versioning, please read our RELEASES.md.

IMPORTANT: Please read the migration guides for any versions of ibc-go that you might be going through when upgrading to this version. For example: if you upgrade from the IBC module contained in the Cosmos SDK 0.42.0 to SDK v0.44.3 and ibc-go v2.0.0, please follow the migration from SDK 0.41.x or 0.42.x to the IBC module in the ibc-go repository based on the SDK v0.44.x AND the migration from ibc-go v1 to v2.