Update react-scripts to 3.4 (Fixes #32)

web_microphone_websocket/package.json

@@ -14,7 +14,7 @@
     "node-vad": "^1.1.4",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
-    "react-scripts": "3.3.0",
+    "react-scripts": "^3.4.0",
     "should": "^13.2.3",
     "should-http": "^0.1.1",
     "socket.io": "^2.3.0",