build: 升级 vue-echarts

frontend/package.json

@@ -50,7 +50,7 @@
     "vue": "2.6.14",
     "vue-calendar-heatmap": "^0.8.4",
     "vue-clipboard2": "^0.3.1",
-    "vue-echarts": "^4.1.0",
+    "vue-echarts": "^6.0.0",
     "vue-float-action-button": "^0.6.6",
     "vue-i18n": "^8.15.3",
     "vue-jsonpath-picker": "^1.1.5",
@@ -68,6 +68,7 @@
     "@vue/cli-plugin-babel": "^4.1.0",
     "@vue/cli-plugin-eslint": "^4.1.0",
     "@vue/cli-service": "^4.1.0",
+    "@vue/composition-api": "^1.2.4",
     "babel-eslint": "^10.0.3",
     "eslint": "^5.16.0",
     "eslint-plugin-vue": "^5.0.0",