v0.86.0

What's Changed

• chore: make format golines by @wolf31o2 in #637
• docs: add contributing guidelines by @wolf31o2 in #640
• feat: TX current treasury value attribute by @agaffney in #641
• feat: TX donation attribute by @agaffney in #642
• feat: support for Conway era certificates by @agaffney in #643
• chore(deps): bump github.com/blinklabs-io/ouroboros-mock from 0.3.0 to 0.3.1 by @dependabot in #644
• refactor: use our types for pool/bech32 by @wolf31o2 in #645

Full Changelog: v0.85.0...v0.86.0