[Snyk] Security upgrade node-fetch from 1.7.3 to 2.6.1#4

Open

snyk-bot wants to merge 1 commit intomasterfrom

snyk-fix-4bda7f2ef6188c2fe953c687e299203e

Commits on Sep 12, 2020

fix: packages/docsify-server-renderer/package.json to reduce vulnerabilities
snyk-bot
committed