Starknet community announced that Cairo 2.7.0 will be released soon. Currently, 2.7.0-rc.3 is available for community testing. This version involves Sierra upgrading to v1.6.0, which means contracts written with v2.7.0 can only be deployed on Starknet 0.13.2 (inclusive) or above. The testnet upgrade is scheduled for August 5th, and the mainnet upgrade is scheduled for August 26th.