update socket.io dependency

Author: delabiejochen

package.json

@@ -47,7 +47,7 @@
     "chalk": "^4.1.2",
     "ora": "^5.4.1",
     "request": "^2.88.2",
-    "socket.io-client": "^2.3.0",
+    "socket.io-client": "^2.4.0",
     "testingbot-tunnel-launcher": "^1.1.11",
     "tracer": "^1.1.5",
     "xmlbuilder2": "^2.4.0",