replaced node-sass by sass, fixed vuesweetalert display #1857

package.json

@@ -19,6 +19,7 @@
   "license": "MIT",
   "dependencies": {
     "@popperjs/core": "^2.11.2",
+    "@sweetalert2/themes": "^5.0.10",
     "axios": "^0.18.1",
     "vue": "^2.6.14",
     "vue-clipboard2": "^0.3.3",
@@ -56,7 +57,7 @@
     "jest": "^24.9.0",
     "jest-serializer-vue": "^2.0.2",
     "mini-css-extract-plugin": "^0.5.0",
-    "node-sass": "^4.14.1",
+    "sass": "^1.50.0",
     "sass-loader": "^7.3.1",
     "style-loader": "^0.23.1",
     "stylus": "^0.54.8",