Release 0.30.60

• Upgrade @ehmicky/eslint-config 15.10.30 -> 15.10.31 (26dedfd)
• Upgrade eslint-plugin-unicorn 13.0.0 -> 14.0.1 (4e1c2d1)
• Upgrade core-js 3.4.2 -> 3.4.5 (5d57fc3)
• Upgrade eslint 6.7.0 -> 6.7.1 (70a8962)
• Upgrade gulp-execa 1.0.3 -> 1.1.0 (c334c33)