Release 15.10.66

• Add new Ava rule (7926dd1)
• Upgrade eslint-plugin-ava 10.2.0 -> 10.3.0 (a99d354)
• npm audit fix (aea6c45)
• Fix workflow.yml (34b545c)
• Add Codecov token (9951ceb)
• Upgrade @ehmicky/dev-tasks 0.31.41 -> 0.31.42 (89e8b5a)
• Upgrade @ehmicky/dev-tasks 0.31.40 -> 0.31.41 (f15fc00)
• Upgrade ava 3.8.0 -> 3.8.1 (f9df991)
• Test on Node 14 (bfb3265)
• Upgrade @ehmicky/dev-tasks 0.31.39 -> 0.31.40 (4bbdfdd)
• Upgrade ava 3.7.1 -> 3.8.0 (200b654)
• Upgrade @ehmicky/dev-tasks 0.31.38 -> 0.31.39 (f9c04c8)