the Much Faster release

What's Changed

• feat: checksum cache by @BobTheBuidler in #771
• feat: unblock contract lock by @BobTheBuidler in #772
• feat: optimize ContractBase.__eq__ by @BobTheBuidler in #770
• chore: refactor Contract by @BobTheBuidler in #774

Full Changelog: v4.0.24...v4.0.25