Release 15.10.28

• Upgrade core-js 3.4.0 -> 3.4.1 (2cc7d67)
• Upgrade execa 3.2.0 -> 3.3.0 (8b3e05e)
• Upgrade prettier 1.18.2 -> 1.19.1 (aced61d)
• Upgrade @ehmicky/dev-tasks 0.30.53 -> 0.30.54 (e644034)
• Upgrade core-js 3.3.6 -> 3.4.0 (bd46df1)
• Upgrade @ehmicky/dev-tasks 0.30.52 -> 0.30.53 (e1c0433)
• Upgrade @ehmicky/dev-tasks 0.30.51 -> 0.30.52 (7a576c8)
• Upgrade @ehmicky/dev-tasks 0.30.50 -> 0.30.51 (e7cbed0)