v2.20.0

What's Changed

• ci: run the canonical test script in the Tests job by @teddychan in #61
• feat(about): adopt DragonKit 3.0.1's fixed-slot About pane by @teddychan in #62
• chore: bump DragonKit to 3.1.0 by @teddychan in #63
• release: 2.20.0 by @teddychan in #64

Full Changelog: v2.19.1...v2.20.0