Bump postcss from 8.4.19 to 8.4.20 (#2459)

package-lock.json

@@ -2835,9 +2835,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.4.19",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.19.tgz",
-      "integrity": "sha512-h+pbPsyhlYj6N2ozBmHhHrs9DzGmbaarbLvWipMRO7RLS+v4onj26MPFXA5OBYFxyqYhUJK456SwDcY9H2/zsA==",
+      "version": "8.4.20",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.20.tgz",
+      "integrity": "sha512-6Q04AXR1212bXr5fh03u8aAwbLxAQNGQ/Q1LNa0VfOI06ZAlhPHtQvE4OIdpj4kLThXilalPnmDSOD65DcHt+g==",
       "dev": true,
       "requires": {
         "nanoid": "^3.3.4",

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "autoprefixer": "^10.4.13",
     "eslint-plugin-compat": "^4.0.2",
-    "postcss": "^8.4.19",
+    "postcss": "^8.4.20",
     "postcss-cli": "^10.1.0",
     "prettier": "2.8.1",
     "xo": "^0.53.1"