8.8.0 Mermaid 8.8.0 & Adjust PDF page size to fit chart size

Changes

• Adjust PDF page size to fit chart size @aler9 (#42)

🚀 Features

• Show how to run with npx @alexkrolick (#46)
• Add PDF tests @MindaugasLaganeckas (#43)

🧰 Maintenance

• Integrate with Percy.io @MindaugasLaganeckas (#27)
• Add workflow to label PRs @MindaugasLaganeckas (#36)
• Bump mermaid from 8.7.0 to 8.8.0 @dependabot (#49)
• Bump bl from 4.0.2 to 4.0.3 @dependabot (#45)
• Bump commander from 6.0.0 to 6.1.0 @dependabot (#44)