rblib v0.4.0

Release notes

• Update to reth 1.8.2 and rust 1.90
• Span history_mut and history_const renamed to history_staging and history_sealed in #25
• Update repository for open-source standards

What's Changed

• add unreachable_pub lint and fix issues by @noot in #4
• feat: implement NamedBarrier by @fahimahmedx in #12
• Update README.md by @dmarzzz in #14
• add banner asset, update readme, add code of conduct by @dmarzzz in #19
• fix: bundle Eligibility as bool by @julio4 in #5
• fix: flashbots bundle eligibility by @julio4 in #6
• Fix: FlashbotsBundle hash impl with metadata by @julio4 in #8
• fix: Checkpoint doc + readability improvements by @julio4 in #18
• Fix: exec doc, readability by @julio4 in #20
• chore: block doc by @julio4 in #15
• update codeowner by @julio4 in #26
• fix: rename history_mut/const to staging/sealed by @julio4 in #25
• chore: bundle doc and syntax by @julio4 in #7
• Chore: bump reth 1.8.2, rust 1.90 by @julio4 in #24
• Feat: CheckpointExt, SpanExt, Span doc + missing helpers by @julio4 in #22
• fix: typos, clippy by @julio4 in #32

Full Changelog: v0.3.1...v0.4.0