解决课程重复问题

package.json

@@ -24,7 +24,7 @@
     "gulp-replace": "1.0.0",
     "gulp-shell": "0.8.0",
     "lodash": "4.17.5",
-    "node-sass": "^6.0.1",
+    "node-sass": "^4.0.0",
     "npm": "^6.9.0",
     "quill-image-resize-module": "^3.0.0",
     "sass-loader": "6.0.6",
@@ -34,7 +34,9 @@
     "vue-cookie": "1.1.4",
     "vue-quill-editor": "^3.0.6",
     "vue-router": "3.0.1",
-    "vuex": "3.0.1"
+    "vuex": "3.0.1",
+    "vxe-table": "^2.11.0",
+    "xe-utils": "^3.5.30"
   },
   "devDependencies": {
     "autoprefixer": "7.1.2",