Bump webpack-dev-server from 2.11.5 to 3.1.11 in /tutorial/flaskvue/frontend#20

DallasAutumn merged 1 commit intomasterDallasAutumn/audio_emotion:masterfrom

dependabot/npm_and_yarn/tutorial/flaskvue/frontend/webpack-dev-server-3.1.11DallasAutumn/audio_emotion:dependabot/npm_and_yarn/tutorial/flaskvue/frontend/webpack-dev-server-3.1.11Copy head branch name to clipboard