Release 15.10.31

• Add new eslint-plugin-unicorn rules (67371e3)
• Upgrade eslint-plugin-unicorn 13.0.0 -> 14.0.1 (affc447)
• Upgrade core-js 3.4.2 -> 3.4.5 (e12d7d3)
• Upgrade eslint 6.7.0 -> 6.7.1 (8fdb513)
• Upgrade execa 3.3.0 -> 3.4.0 (667a89e)
• Upgrade @ehmicky/dev-tasks 0.30.58 -> 0.30.59 (24e85aa)