updated to vue3

initial work on more reactive EventSource wrapper

frontend/package.json

@@ -9,21 +9,20 @@
   },
   "dependencies": {
     "bulma": "^0.9.2",
-    "core-js": "^3.12.0",
-    "vue": "^2.6.12",
-    "vue-router": "^3.5.1"
+    "core-js": "^3.6.5",
+    "vue": "^3.0.0",
+    "vue-router": "^4.0.8"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "~4.4.0",
-    "@vue/cli-plugin-eslint": "~4.4.0",
-    "@vue/cli-plugin-router": "^4.5.13",
-    "@vue/cli-service": "^4.5.13",
+    "@vue/cli-plugin-babel": "~4.5.0",
+    "@vue/cli-plugin-eslint": "~4.5.0",
+    "@vue/cli-service": "~4.5.0",
+    "@vue/compiler-sfc": "^3.0.0",
     "babel-eslint": "^10.1.0",
     "eslint": "^6.7.2",
-    "eslint-plugin-vue": "^6.2.2",
-    "node-sass": "^4.14.1",
-    "sass-loader": "^9.0.3",
-    "vue-template-compiler": "^2.6.12"
+    "eslint-plugin-vue": "^7.0.0",
+    "node-sass": "^6.0.0",
+    "sass-loader": "^10.0.0"
   },
   "eslintConfig": {
     "root": true,
@@ -31,7 +30,7 @@
       "node": true
     },
     "extends": [
-      "plugin:vue/essential",
+      "plugin:vue/vue3-essential",
       "eslint:recommended"
     ],
     "parserOptions": {