Release 15.10.63

• Update CI matrix (6bdd6d7)
• Update workflow.yml (8e2b4fe)
• Upgrade eslint-plugin-html 6.0.1 -> 6.0.2 (f632032)
• Upgrade ava 3.6.0 -> 3.7.0 (1175b3f)
• Upgrade @ehmicky/dev-tasks 0.31.34 -> 0.31.35 (1f0133b)