Release 0.31.12

• Upgrade @babel/register 7.8.6 -> 7.9.0 (78ae805)
• Upgrade @babel/preset-env 7.8.7 -> 7.9.0 (a581194)
• Update mkdirp (d037d6e)
• Upgrade release-it 13.1.1 -> 13.1.2 (fb7c80b)
• Upgrade eslint-config-standard 14.1.0 -> 14.1.1 (7b1fae2)
• Update codecov (f1a1e2b)