[Snyk] Upgrade http-proxy-middleware from 0.19.1 to 0.21.0#4

Open

snyk-bot wants to merge 1 commit intomasterfrom

snyk-upgrade-f9303033ecaec0db10697d4a1ae6b6f2

Commits on Apr 9, 2020

fix: upgrade http-proxy-middleware from 0.19.1 to 0.21.0
snyk-bot
committed