Release 0.31.1

• Upgrade @ehmicky/eslint-config 15.10.37 -> 15.10.38 (0c836b7)
• Upgrade eslint-plugin-unicorn 15.0.0 -> 15.0.1 (cab7205)
• Upgrade core-js 3.6.0 -> 3.6.1 (3a68e6e)
• Upgrade gulp-execa 1.1.0 -> 2.0.0 (71e85d0)