revert: "ci(appveyor): test on Node.js 10 only"
revert: "ci(appveyor): test on Node.js 10 only"

This reverts commit 1341969fe6171d19a1400a803c09ef49114dbd53.

pnpm/pnpm,pnpm/pnpm,rstacruz/pnpm,rstacruz/pnpm,pnpm/pnpm,rstacruz/pnpm