package.json add stompjs

package.json

@@ -11,6 +11,7 @@
     "core-js": "^3.6.5",
     "echarts": "^5.0.0",
     "element-ui": "^2.4.5",
+    "stompjs": "^2.3.3",
     "vue": "^2.6.11",
     "vue-router": "^3.2.0",
     "vuex": "^3.6.0",