v2.0.0-cronos-alpha1

Second release for "Pioneer11"

Whats Changed?

• Major gas optimisation in the solidity contracts
• Support reverted transactions in the solidity contract
• Improvement on the relayer by adding 3 cost-calculation modes
• Upgraded ibc-go and cosmos sdk
• Fix multiple bugs on the module and orchestrators
• Add the ability to stop the bridge and parameterised multiple configs
• Add invariant check
• Optimize storage by pruning old attestations