Update

package.json

@@ -8,11 +8,19 @@
     "preview": "vite preview"
   },
   "devDependencies": {
+    "autoprefixer": "^10.4.5",
+    "cssnano": "^5.1.7",
+    "postcss-css-variables": "^0.18.0",
     "typescript": "^4.5.4",
     "vite": "^2.9.5"
   },
   "dependencies": {
+    "@vitejs/plugin-legacy": "^1.8.1",
     "typed.js": "^2.0.12",
     "workbox-cdn": "4.2.0"
-  }
+  },
+  "browserslist": [
+    "defaults",
+    "not ie 11"
+  ]
 }