Release 0.30.59

• Upgrade @ehmicky/eslint-config 15.10.29 -> 15.10.30 (c6c2ad5)
• Upgrade core-js 3.4.1 -> 3.4.2 (920e11f)
• Upgrade husky 3.0.9 -> 3.1.0 (11e9d36)
• Upgrade eslint 6.6.0 -> 6.7.0 (e1a6f94)
• Upgrade @babel/register 7.7.0 -> 7.7.4 (74529d0)
• Upgrade @babel/preset-env 7.7.1 -> 7.7.4 (5912371)