Update postcss version requirement (#528)

Updated postcss dependency version to >=8.4.31.

quiz-app/package-lock.json

@@ -2862,7 +2862,7 @@
         "minimist": "^1.2.5",
         "module-alias": "^2.2.2",
         "portfinder": "^1.0.26",
-        "postcss": "^8.2.6",
+        "postcss": ">=8.4.31",
         "postcss-loader": "^6.1.1",
         "progress-webpack-plugin": "^1.0.12",
         "ssri": "^8.0.1",
@@ -3064,7 +3064,7 @@
         "@vue/shared": "3.5.18",
         "estree-walker": "^2.0.2",
         "magic-string": "^0.30.17",
-        "postcss": "^8.5.6",
+        "postcss": ">=8.4.31",
         "source-map-js": "^1.2.1"
       }
     },
@@ -3087,7 +3087,7 @@
         "hash-sum": "^1.0.2",
         "lru-cache": "^4.1.2",
         "merge-source-map": "^1.1.0",
-        "postcss": "^7.0.36",
+        "postcss": ">=8.4.31",
         "postcss-selector-parser": "^6.0.2",
         "source-map": "~0.6.1",
         "vue-template-es2015-compiler": "^1.9.0"
@@ -3120,7 +3120,7 @@
     },
     "node_modules/@vue/component-compiler-utils/node_modules/postcss": {
       "version": "7.0.39",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-7.0.39.tgz",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
       "integrity": "sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==",
       "dev": true,
       "dependencies": {
@@ -3642,7 +3642,7 @@
         "node": "^10 || ^12 || >=14"
       },
       "peerDependencies": {
-        "postcss": "^8.1.0"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/babel-eslint": {
@@ -4650,7 +4650,7 @@
         "node": "^10 || ^12 || >=14"
       },
       "peerDependencies": {
-        "postcss": "^8.0.9"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/css-loader": {
@@ -4660,7 +4660,7 @@
       "dev": true,
       "dependencies": {
         "icss-utils": "^5.1.0",
-        "postcss": "^8.4.7",
+        "postcss": ">=8.4.31",
         "postcss-modules-extract-imports": "^3.0.0",
         "postcss-modules-local-by-default": "^4.0.0",
         "postcss-modules-scope": "^3.0.0",
@@ -4702,7 +4702,7 @@
       "dependencies": {
         "cssnano": "^5.0.6",
         "jest-worker": "^27.0.2",
-        "postcss": "^8.3.5",
+        "postcss": ">=8.4.31",
         "schema-utils": "^4.0.0",
         "serialize-javascript": "^6.0.0",
         "source-map": "^0.6.1"
@@ -4856,7 +4856,7 @@
         "url": "https://opencollective.com/cssnano"
       },
       "peerDependencies": {
-        "postcss": "^8.2.15"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/cssnano-preset-default": {
@@ -4899,7 +4899,7 @@
         "node": "^10 || ^12 || >=14.0"
       },
       "peerDependencies": {
-        "postcss": "^8.2.15"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/cssnano-utils": {
@@ -4911,7 +4911,7 @@
         "node": "^10 || ^12 || >=14.0"
       },
       "peerDependencies": {
-        "postcss": "^8.2.15"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/csso": {
@@ -6815,7 +6815,7 @@
         "node": "^10 || ^12 || >= 14"
       },
       "peerDependencies": {
-        "postcss": "^8.1.0"
+        "postcss": ">=8.4.31"
       }
     },
     "node_modules/ieee754": {