Downgrading to compatible version of SockJS-Client (#1274)

Author: holloway

packages/react-dev-utils/package.json

@@ -28,7 +28,7 @@
     "escape-string-regexp": "1.0.5",
     "html-entities": "1.2.0",
     "opn": "4.0.2",
-    "sockjs-client": "1.0.3",
+    "sockjs-client": "1.0.1",
     "strip-ansi": "3.0.1"
   }
 }