Update stylelint config for stylelint v14

.stylelintrc.json

@@ -1,12 +1,15 @@
 {
-  "processors": ["@mapbox/stylelint-processor-arbitrary-tags"],
   "extends": [
+    "stylelint-config-html/vue",
     "stylelint-config-standard",
-    "./node_modules/prettier-stylelint/config.js"
+    "stylelint-config-prettier"
   ],
   "rules": {
-    "no-empty-source": null,
-    "no-empty-first-line": null,
-    "custom-property-no-missing-var-function": null
-  }
+  },
+  "overrides": [
+    {
+      "files": ["**/*.scss"],
+      "customSyntax": "postcss-scss"
+    }
+  ]
 }

package.json

@@ -120,7 +120,6 @@
     "@babel/preset-env": "^7.15.8",
     "@babel/runtime": "7.15.4",
     "@electron/universal": "^1.1.0",
-    "@mapbox/stylelint-processor-arbitrary-tags": "^0.4.0",
     "@types/auto-launch": "^5.0.2",
     "@types/electron-json-storage": "^4.5.0",
     "@types/i18next": "^13.0.0",
@@ -177,13 +176,18 @@
     "mini-css-extract-plugin": "^2.4.3",
     "node-loader": "^2.0.0",
     "node-sass": "^6.0.1",
+    "postcss": "^8.4.5",
+    "postcss-html": "^1.3.0",
+    "postcss-scss": "^4.0.2",
     "prettier": "^2.4.1",
-    "prettier-stylelint": "^0.4.2",
     "regenerator-runtime": "^0.13.9",
     "sass-loader": "^12.2.0",
     "style-loader": "^3.3.1",
     "stylelint": "^14.0.0",
+    "stylelint-config-html": "^1.0.0",
+    "stylelint-config-prettier": "^9.0.3",
     "stylelint-config-standard": "^23.0.0",
+    "stylelint-scss": "^4.1.0",
     "ts-jest": "^26.5.6",
     "ts-loader": "^9.2.6",
     "ttfinfo": "^0.2.0",