v0.6.0

Changed

• Upgrade Solana crates to 2.2.0 (#138).
• Consolidate feature set management into a with_feature_set method and remove the feature_set param from with_builtins and with_precompiles (#142).
• Update builtins and downgrade spl-token-2022 to v5.0.2 to match mainnet version (#130).

Added

• Add pretty_logs method to TransactionMetadata (#134).
• Add error logging when loading a program (#141).