EVM node: Release version 0.21

This release finalizes the new experimental tx_queue which allows to send multiple transactions to be included in a single block. It also improves the bootstrapping process with snapshots and considerably speeds up the catch-up phases.

This release will not apply any migration to the node’s store (version 20), meaning it is possible to downgrade to the previous version.

Configuration files created with versions v0.17 and v0.18 might cause encoding errors related to l2_chain or lead to Mismatched_chain_family issues. Operators of EVM nodes should verify their configurations by running:

octez-evm-node check config

If issues persist after verification, remove the l2_chains entry from the experimental_features section of your configuration file.

By default, the configuration file (config.json) is located in your data_dir directory.