Release Candidate for Kava 12

For deployment to Kava Testnet on 31 Jan, 2023.

This release candidate adds a x/community module that is used to manage community pool funds via governance by Kava DAO. It includes additional enhancements to the EVM.

Software versions:
Golang: v1.18 (using a version other than 1.18 will result in app hash mismatches. v1.18 MUST be used.)
Cosmos-sdk: v0.45.10
Tendermint: v0.34.24

It contains two upgrade handlers:

• v0.21.0-alpha.0 - To be run on testnet. Rolls back state changes made in abandoned upgrade v0.20.0-alpha.0. Upgrades chain to the proposed Kava 12 state.
• v0.21.0 - To be run on mainnet. Upgrades the chain to Kava 12.

x/community

• includes two gov proposals for deposit/withdraw of community pool funds to Kava Lend (x/hard)

EVM enhancements

• ethermint updated
• Allows 'finalized' to be used on eth json rpc calls
• Fixes eth_call for old heights (prevent panic on GetParams before allowed EIP messages were set)