v0.5.1

What's Changed

• feat: use keccak builtin by @enitrat in #1053
• feat: use blockhash syscall by @enitrat in #1062
• feat: account versioning by @enitrat in #1058
• deploy kakarot v0.5.0-1 on sepolia by @greged93 in #1066
• Store COINBASE in storage_var by @ClementWalter in #1069
• Optimize uint256_add and uint256_sub by @ClementWalter in #1070
• feat: estimate_gas by @enitrat in #1074

Full Changelog: v0.5.0-1...v0.5.1