v1.3.0

What's Changed

• Improve contributor workflow, tooling, and release guidance by @nickmoreton in #48
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci[bot] in #50
• Add Wagtail 7.3 test coverage by @nickmoreton in #51
• Add GitHub Actions PyPI release workflow by @nickmoreton in #52
• Update AGENTS release guidance by @nickmoreton in #53
• Prepare 1.3.0 release by @nickmoreton in #54
• Test CI by @nickmoreton in #49
• Update branch workflow to main by @nickmoreton in #55

Full Changelog: 1.2.1...v1.3.0