v1.3.0

What's Changed

• Update README for latest release by @ToasterTheBrave in #873
• Adding some mocks needed by pigeon by @ToasterTheBrave in #875
• Add error data to messages in turnstone queue by @ToasterTheBrave in #876
• Update README.md by @verabehr in #877
• Fix payload sender appending by @ToasterTheBrave in #879
• Toaster/release notes by @ToasterTheBrave in #880

Full Changelog: v1.2.0...v1.3.0