6.3.1

Patches

• Bump node-fetch from 2.6.0 to 2.6.1: #178
• Bump ini from 1.3.5 to 1.3.7: #181
• Bump dot-prop from 4.2.0 to 4.2.1: #182
• Update README.md: 145a816
• Update README.md: fdad389
• Change from ZEIT to Vercel for auth URL.: #188