Update stylelint

.stylelintrc

@@ -1,7 +1,7 @@
 {
   "extends": [
-    "stylelint-config-standard",
+    "stylelint-config-recommended",
     "stylelint-config-styled-components"
   ],
-  "syntax": "css"
+  "customSyntax": "postcss-jsx"
 }

package.json

@@ -53,8 +53,10 @@
     "jest": "^27.1.0",
     "next-sitemap": "^1.6.203",
     "npm-run-all": "^4.1.5",
-    "stylelint": "^13.13.1",
-    "stylelint-config-standard": "^22.0.0",
+    "postcss-jsx": "^0.36.4",
+    "postcss-syntax": "^0.36.2",
+    "stylelint": "^14.2.0",
+    "stylelint-config-recommended": "^6.0.0",
     "stylelint-config-styled-components": "^0.1.1",
     "testcafe": "^1.15.3",
     "ts-jest": "^27.0.5",