Merge pull request microsoft#387 from microsoft/dependabot/npm_and_yarn/socket.io-2.4.0

Bump socket.io from 2.2.0 to 2.4.0

Author: brettcannon

package-lock.json

@@ -310,7 +310,7 @@
         "react-dom": "^16.9.0",
         "react-intl": "^3.1.9",
         "react-test-renderer": "^16.9.0",
-        "socket.io": "^2.2.0",
+        "socket.io": "^2.4.0",
         "svg-inline-react": "^3.1.0",
         "ts-jest": "^25.0.0",
         "usb-native": "^5.0.1",