[Snyk] Security upgrade express from 4.16.3 to 4.21.2#397

lisong wants to merge 1 commit intomasterlisong/code-push-server:masterfrom

snyk-fix-3fb3f37be81e0e09e6d4befa9430b2b5lisong/code-push-server:snyk-fix-3fb3f37be81e0e09e6d4befa9430b2b5Copy head branch name to clipboard