Make a v1.3.0 release of ics

[faddat]

The ICS documentation clearly states the versioning practice as one where when breaking changes happen, a new minor release is cut, to ensure that there is not confusion among users.

This is right and good.

This release:

https://github.com/cosmos/interchain-security/releases/tag/v1.2.0-multiden

For whatever reason sits outside of those policies.

The correct approach would be to take that, and the other changes that have accumulated in main and issue a new release.

[jtremback]

Agree

[shaspitz]

Agreed @faddat, this issue will be superseded by #949 which follows the EPIC template